Inductance calculation by COMSOL part 1: loop inductance ( vs analytical formula and measurement ) High Voltage Engineering by MG Niasar 2026-09-23 | Inductance calculation by COMSOL part 1: loop inductance ( vs analytical formula and measurement )
Smoke Generator , Fog Generator ( part 2 ), Low-Rising Smoke / Fog Using a Chiller Unit High Voltage Engineering by MG Niasar 2025-10-12 | After building my first smoke machine, I wanted to create one that lets the smoke flow along the ground. To achieve this, the fog needs to be cooled so it stays low. I designed a simple chiller unit and connected it to my smoke generator.Link to part 1:youtube.com/watch?v=85WH2DpWboYFinance: N=93 subs=6855 Available budget (N):6855-100-93*(93+1)=-1987Storage limit: 2^ln(6855)=455,95
Smoke Generator , Fog Generator ( part 1 ) High Voltage Engineering by MG Niasar 2025-10-06 | For some flow analysis experiments, I need visible fog or smoke. In this video, I show you how to use the mechanism found in vapes to generate smoke at home.Music: Away by Patrick Patrikios, from Youtube audio library Finance: N=92 subs=6851 Available budget (N):6851-100-92*(92+1)=-1805Storage limit: 2^ln(6851)=455,76
Turbo flame ( jet flame ) vs soft flame gas lighter High Voltage Engineering by MG Niasar 2025-09-25 | In this video I explain the difference between jet flame or turbo flame gas lighter versus the soft flame gas lighter. Since I have little experience in this field, maybe there are some mistakes in my video, if you detect one, please comment it in the comment section.Finance: N=91 subs=6829 Available budget (N):6829-100-91*(91+1)=-1643Storage limit: 2^ln(6829)=454,75
How to Control Flame Size in a Penny Can Alcohol Stove ( Bioethanol Powered ) High Voltage Engineering by MG Niasar 2025-09-12 | Link to previous relevant video: How to Make a Penny Can Alcohol Stove ( Bioethanol Powered )youtube.com/watch?v=AUkNbElH2d0&t=603sAfter I made my penny can alcohol stove, I noticed that the flames were a bit large, and I wanted to make them smaller. After some careful thought, I came up with a method to control the flame size in a penny can alcohol stove.Two methods were explored, of which the second—using water to cool the can and adjust its temperature—proved effective for controlling the flame size.Music: Night Snow by Asher Fulero, from Youtube audio library Finance: N=90 subs=6799 Available budget (N):6799-100-90*(90+1)=-1491 Storage limit: 2^ln(6799)=453,36
How to Make a Penny Can Alcohol Stove ( Bioethanol Powered ) High Voltage Engineering by MG Niasar 2025-09-05 | After many months of inactivity, I’m finally back 🙂 with lots of new ideas and videos coming soon! Originally, I planned for my first comeback video to be about a pulse jet engine. But since making it burn clean required a few extra steps, I ended up creating this penny alcohol stove instead, as the initial step to make the pulse jet engine. Finance: N=89 subs=6780 Available budget (N):6780-100-89*(90+1)=-1330 Storage limit: 2^ln(6780)=452,5
Preparing Sahari ; grilling sheep heart with torch while fighting off wild animal 😂 High Voltage Engineering by MG Niasar 2025-03-06 | It’s the month of Ramadan, and I was preparing something for Sahari. Yesterday, I got three sheep hearts and roasted some of them in a pan with onion and tomato, but they didn’t turn out very tasty. Normally, grilled heart is delicious, but I wasn’t motivated to set up a coal fire outside. Since I don’t have a gas burner at home, I decided to use my torch to grill them indoors.Meanwhile, a curious spider appeared, seemingly checking out the fire nearby 😅. I had to gently guide it away.In the background, a prayer that is traditionally broadcast on TV in Iran during Sahari is being played.I had been sick for the past two weeks, but thankfully, I’m almost fully recovered now. Thanks God.Finance: N=88 subs=6192 Available budget (N):6192-100-88*(88+1)=-1740 Storage limit: 2^ln(6192)=424,9
LTspice tutorials part 1 : Getting Started, Voltage Controlled Switch, Setting Initial Conditions High Voltage Engineering by MG Niasar 2025-02-16 | Since I plan to show everybody how to optimize a single MOSFET solid state Tesla coil, I decided to prepare these few videos on LTspice first, so that all of viewers can use this free tool to do their circuit simulation. this is the first video on how to get started with LTspice, setting initial conditions of a capacitor, how to use voltage controlled switch and also how to plot an analytical formula in LTspice. later i will make videos about mutually coupled inductors, how to drive a switch and how to optimize circuit parameters.Download LTspice: analog.com/en/resources/design-tools-and-calculators/ltspice-simulator.htmlFinance: N=87subs=6105Available budget (N):6105-100-87*(87+1)=-1651Storage limit: 2^ln(6105)=420,76
Working on Single Mosfet Solid State Tesla Coil , Streamers of +50 cm is already achieved High Voltage Engineering by MG Niasar 2025-02-10 | Last week I got some time and am working on to perform an optimization on single Mosfet solid state Tesla coil. as soon as the optimization is completed, I plan to write a paper, maybe a letter to IEEE and will then publish the procedure of optimization and the results. For now I just modified a bit the previous design and already discharges of more than 50 cm are achieved. Music from YouTube Audio library, Track name: Pontiac Shuffle Producer: ALBISFinance: N=86subs=6082Available budget (N):6082-100-86*(86+1)=-1500Storage limit: 2^ln(6082)=419,66
Three beautiful topological puzzles High Voltage Engineering by MG Niasar 2025-01-12 | Recently I found a YouTube channel with many nice simple puzzles. I liked several of them and decided to make them myself. I created 3D models and printed them and thought of sharing the experience with other people.You can download the files from the following link.Note that there are three puzzles that I show in the video and i also named the .stl files accordingly. When you want to 3D print them, rotate the objects so that they are in the right orientation for slicing and creating the g-code.drive.google.com/drive/folders/1UOjRx1pz4SZ-FU5jRXSZg5j7lhWje86U?usp=sharingThe name of the YouTube channel which i learned these puzzles from is: @univea48 check his channel, it has many more puzzles. Finance: N=85subs=5969Available budget (N):5969-100-85*(85+1)=-1441Storage limit: 2^ln(5969)=414,24
How to put a character above or below a word or a letter in Microsoft Word High Voltage Engineering by MG Niasar 2024-12-26 | I wanted to refer to triangle ABC in a text and I had to spend more than 15 minutes to find out how to put the symbol of triangle on top of ABC, after that i thought to share it with you, so to avoid you wasting your time😊.Finance: N=84subs=5905Available budget (N):5905-100-84*(84+1)=-1335Storage limit: 2^ln(5905)=411,16
Robins singing at night , welcoming me home , Delft High Voltage Engineering by MG Niasar 2024-12-15 | It is December 2024 and I recently noticed that when I come home late after 1:00 in the mid-night, a few robins that live nearby my house, sing at that time. It is very refreshing to hear their song when i get home, in the silence of the night. I thought to share it with you. I once bought in a second had market saw a metallic sculpture of a bird. I liked it and bought it. When i heard the song of the bird near my house and i could see the bird in one night, I realized that it is the same as the sculpture. So I got to know how robin's sing for the first time.Finance: N=83subs=5862Available budget (N):5862-100-83*(83+1)=-1210Storage limit: 2^ln(5862)=409,1
ChatGPT does not work in Mozilla Firefox - A quick fix High Voltage Engineering by MG Niasar 2024-11-25 | The lovely ChatGPT stopped working in Mozilla, so a quick fix was needed. After finding it, I thought of sharing it—hopefully, it saves others some time.Finance: N=82subs=5780Available budget (N):5780-100-82*(82+1)=-1126Storage limit: 2^ln(5780)=405,1
A beautiful inequality that I could not forget High Voltage Engineering by MG Niasar 2024-11-17 | Every now and then when Youtube suggests me a math problems, even if I am tired or have a lot of deadlines, I can be easily dragged into solving that math problem. It feels great, the logic and the fact that you know the rules are known and do not change and you just need to find out how to combine them to find your way. Several times during the past years I promised myself that when my university load become more manageable and when this channel grows a bit larger I will open another Youtube channel and will offer math Olympiad lectures, maybe it will be helpful for students across the globe specially for students in the Netherlands and Sweden, the two countries that have hosted me for many years. In Iran we have a very advance system for those students who would like to study math, physics, chemistry etc Olympiads. When I was at high school we had several very high quality teachers who trained a few of us for math Olympiad in lectures after the normal school hours. I salute my teachers with heartfelt gratitude and respect. Such a nice atmosphere, and great memories. I loved that period of my life. If any high school students who lives near Delft in the Netherlands, feels that he/she has the capacity and the interest to study for math Olympiad but can't find a good lecturer to guide him/her, and it happens that you read this text, you can send me an email and I will support you. Finance: N=81subs=5736Available budget (N):5736-100-81*(81+1)=-1006Storage limit: 2^ln(5736)=402,96
Shape optimization in COMSOL Multiphysics - part 1 High Voltage Engineering by MG Niasar 2024-11-05 | In this video I will show you the basic of shape optimization in COMSOL Multiphysics. We try to find a 2D shape that has minimum perimeter for a given fixed area. based on Isoperimetric theorem we know that this shape should be a circle. This example does not involve a physics, however in the next videos I will show you examples that involves electrostatics physics.Also in a separate video I will cover issues related to adaptive meshing and the geometry re-meshing during the optimization Proof of Isoperimetric theorem:drive.google.com/file/d/15dV_KwFXdUyLMUOjJr0dB-vIpobBAyin/view?usp=sharingFinance: N=80subs=5688Available budget (N):5688-100-80*(80+1)=-892Storage limit: 2^ln(5688)=400,62
How to create a new component using Simscape language in MATLAB Simulink High Voltage Engineering by MG Niasar 2024-10-26 | In this video I show you how to make a new component using Simscape language in MATLAB Simulink. For one of my students, The great Sohrab, we needed to create a transformer with multiple windings in Simscape. Such component is not available in the existing Simulink library, so I studied how to create a new component in Simulink. This video shows the procedure. In a later video I will show you how to make a multi winding transformer in Simscape.Here are some good links related to the topic:nl.mathworks.com/help/simscape/lang/creating-custom-components.htmlnl.mathworks.com/help/simscape/component-equations.htmlnl.mathworks.com/help/simscape/creating-custom-components.htmlFinance: N=79subs=5644Available budget (N):5644-100-79*(79+1)=-776Storage limit: 2^ln(5644)=398,475
How to measure large resistances (up to 10s of Giga Ohm) using a normal Multimeter High Voltage Engineering by MG Niasar 2024-08-11 | In this video I will show you how to measure large resistances using a normal Multi-meter and a bench power supply.In a second video I will make a tiny electronics circuitry so that using same setup we can measure up to 10s of Tera Ohm and also how to measure polarization and depolarization current.It was for more than half a year that due to very busy life and work I could not upload any YouTube video. Gradually the period of overload is moving away and hopefully I will upload videos regularly.Finance: N=78subs=5362Available budget (N):5362-100-78*(78+1)=-900Storage limit: 2^ln(5362)=384,56
How to add an equation in Visio & How to draw a shape programmatically in Visio High Voltage Engineering by MG Niasar 2023-12-31 | In this video I show you how to add an equation into a Visio drawing. Also I show you how to change the limits of a control point that are available on some of Visio shapes. Finally I will show you how to make a relatively complicated/repetitive shape, programmatically utilizing ChatGPT and programing in VBA.It has been again a long time since I made my last video. These days workload has increased so much that even though I like to make videos, but I do not get any free time. Hopefully in 2-3 months things will settle and I will get more free time. Tomorrow the year 2024 will start. Happy New Year everyone.Music: YouTube Audio Library, Commander Impulse, Artist: DivKidFinance: N=77subs=4085Available budget (N): 4085-100-77*(77+1)=-2021Storage limit: 2^ln(4085)=318,48
How to calculate inductance in 3D in COMSOL Multiphysics High Voltage Engineering by MG Niasar 2023-11-03 | In this video I show you how to perform a 3D model in COMOSL to calculate inductance. It is very important to check the quality of the mesh before running the simulation. Also make sure that number of meshes are not so high that your computer ram can not handle them. I showed the simulation for two cases, a rectangular loop, and a rectangular loop with a toroid around it. After more than 2 months of not being able to make any video I am finally back. I recorded this video 25 days ago, but due to busy life I could not edit it and upload it. Anyway here you have it. Congratulations to Brecht who has defended his master thesis in October. He also taught me how to program a PLD, which I am going to make a separate video for that.Finance: N=76subs=3810Available budget (N): 3810-100-76*(76+1)=-2142Storage limit: 2^ln(3810)=303,46
Repairing a broken card holder High Voltage Engineering by MG Niasar 2023-08-17 | My card holder (Secrid brand) dropped from my hand and its movement mechanism broke. It was given to me as a gift so I had to repair it. I repaired it a while back by melting it together but again it fell of my hand and totally broke. This time i decided to repair it properly.The waves of documents and theses to review and preparation for an upcoming talk and a conference to participate and lectures of the new academic year, and many projects at hand, are crushing. Everything will be done eventually on time but sometime I say to myself break this lovely cage and fly.On 11th August Abhinav defended his thesis, excellent presentation he delivered, congratulations Abhinav.Finance: N=75subs=3465Available budget (N): 3465-100-75*(75+1)=-2335Storage limit: 2^ln(3465)=284,14
How to convert image into curve in COMSOL High Voltage Engineering by MG Niasar 2023-08-10 | Sometime you have an image of an object and you you want to convert it into a workable geometry in COMOSL or you want to make a 3D print of that object. While COMSOL permits you to import .dxf files, but your image is most likely a .png or .jpg file. Obviously in a professional image editing software you can convert an image into a vector and create a .dxf file but you may not have such software available. In this case you can directly use COMSOL image to curve feature available under developer section to achieve this goal. In this video i show you several examples how to do it.Finance: N=74subs=3438Available budget (N): 3438-100-74*(74+1)=-2212Storage limit: 2^ln(3438)=282,60
How to make double layer tea High Voltage Engineering by MG Niasar 2023-07-30 | Hi, I am back :), after nearly two months of not being able to make any video, i got some time to make a short video, and more new technical videos will come soon. Life has been so much busy this whole summer. So many students. A few of my master students have graduated, Mahesh, Ewout, Gijs and Shibanni, congratulations to all of you for the excellent job you all did in your master thesis work. A few more are left, good luck to you boys and girls. Since several months I got some pain in my stomach, it comes and go and is annoying making me tired and not let me work the way i want. Hopefully it will go away. I should concentrate on the channel and make many videos to at least leave something in case in soon future i meet the god :).Finance: N=73subs=3393Available budget (N): 3393-100-73*(73+1)=-2109Storage limit: 2^ln(3393)=280,04
How to make Weibull probability plot and its confidence bounds in MATLAB + median rank explanation ) High Voltage Engineering by MG Niasar 2023-06-10 | Eventually after several years I got time to make a video about Weibull distribution and how to plot its confidence intervals. I wanted to make this video several years ago, but due to the fact that I could not find the proof of one formula i put it aside. Recently one of my student needed to plot confidence bounds of Weibull plot. I decided to explain how to do it in MATLAB. Also since I could not find the proof of the formula for calculation of median rank, i decided to tackle it myself instead of wasting time to find a solution on internet. It took only very short time to find the answer. I also explained a bit in detail the meaning of median rank and why it is calculated the way it is.Here you can download the MATLAB codes:drive.google.com/file/d/1sjbz-EZFfXLleWOlw-Mbqfl5AmtDmAqL/view?usp=sharingHere you can download an excel file written by prof. Rob Ross, which you can use for free to do statistical analysis such as Weibull plot.https://iwo.nl/downloads/Finance: N=72subs=3195Available budget (N): 3195-100-72*(72+1)=-2161Storage limit: 2^ln(3195)=268,6
How to run a Simulink model for different input parameters and plot the simulations results High Voltage Engineering by MG Niasar 2023-05-14 | I needed to perform a sensitivity analysis on a Simulink model, so I decided to show how you can run a Simulink model many times and study impact of input parameters on the simulation output. It is very obvious, but maybe become of some help to some of the new MATLAB users.More than 40 days has passed and I could not manage to make any videos. My friend Luis was going to come to my home and it took me so much time to clean my home, and even so I did not manage to totally clean it. Anyway he came this Saturday and we talked and had lunch. Now back on Youtube business :). So many ideas in the pipeline, but no time. Finance: N=71subs=3104Available budget (N): 3104-100-71*(71+1)=-2108Storage limit: 2^ln(3104)=263,27
How to make conductive paint ( Graphite powder + Nail Hardener or Acrylic Varnish ) High Voltage Engineering by MG Niasar 2023-04-09 | For a research project we needed to create a semi conductive layer around the test object. We tried silicone rubber and carbon black at university but could not achieve much conductivity. Our silicone rubber could not take much of carbon black in it and with high percentage of carbon black it turned into a solid paste which could not be cured. I therefore decided to take the matter to home and solve the issue at home. I bought Nail hardener and acrylic varnish from Action shop (The Netherlands), pretty cheap, each for less than 1.5 Euro.Graphite powder was purchased from Ali express for ~ 5 Euro per 100 ml. I put the link in the description. Graphite powered is usually used as lubricant (for example if you want to lubricate piston of a model striling engine best is to use graphite powder).It was found that for resistances in order-of 100s of Ohm/cm to a few kOhm/cm, 30% ratio or higher of graphite powder to nail hardener produce good results. For resistances in order of 10s of kOhm/cm to MOhm/cm 30% ratio or higher graphite powder to acrylic varnish gives good results.Graphite powder:nl.aliexpress.com/item/1005002024103361.html?spm=a2g0o.order_list.order_list_main.352.7b9979d2jXvCWQ&gatewayAdapt=glo2nldFinance: N=70subs=2952Available budget (N): 2952-100-70*(70+1)=-2118Storage limit: 2^ln(2952)=254,27
How to draw a spiral structure in COMSOL + how to assign colours to domains and boundaries in COMSOL High Voltage Engineering by MG Niasar 2023-03-19 | In this video I show you how to create a spiral structure in COMSOL and also i show you how to assign different colors to domains and boundaries.For a master thesis project we want to make a HVDC source based on wireless power transfer. We therefore needed to make a spiral structure to hold the litz wire and hence we could create a pancake coil. Talented master student, Suraj has created this structure in another 3D software and we 3D printed it. I then decided to make the same directly in COMSOL. To do so, first I explain a bit about spiral equation. We then use this information to create a programmatic curve to draw the spiral.en.wikipedia.org/wiki/Archimedean_spiralhttp://www.mathematische-basteleien.de/spiral.htmWork life balance has these days become a dream. no time even to make Youtube videos. But future is bright and I stay positive.Finance: N=69subs=2857Available budget (N): 2857-100-69*(69+1)=-2073Storage limit: 2^ln(2857)=248,57
Flame rectification and physics behind it ( flame based diode ) High Voltage Engineering by MG Niasar 2023-02-08 | Flame has a property that can be used to rectify AC voltage. Basically the flame can act as a diode, However the amount of current that can pass through the flame is rather small so it has limited application. One of the application of flame rectification is to detect if there is a flame or not. This can act as a safety device and can provide information if the burner has flame or not.I will explain the physics behind flame rectification which is more or less similar to how vacuum diodes work.Due to busy life during the past 40 days i could not make any videos. Must work on my channel and make new good videos. But anyway people do not watch so motivation is not that high.Finance: N=68subs=2692Available budget (N): 2692-100-68*(68+1)=-2100Storage limit: 2^ln(2692)=238,53
Electric field and candle flame + measurement of candle flame electrical conductivity High Voltage Engineering by MG Niasar 2022-12-29 | After I made my first video on effect of electric field on a candle flame, I decided to know more about the topic. It is interesting to know that a lot of research has been done on this topic. Among the many publications which i looked at, one PhD thesis stands out, so if you plan to read here is the link: spiral.imperial.ac.uk/bitstream/10044/1/15991/2/Melinek-SJ-1969-PhD-Thesis.pdfAlso it amazing that if we ask questions and insist in finding the answer, within short time we can learn so many new things. Sometimes I wish i could live forever to learn about everything. So satisfying to know how things work.Finance: N=67subs=2505Available budget (N): 2505-100-67*(67+1)=-2151Storage limit: 2^ln(2505)=226,73
Effect of electric field on a candle flame ( ionic wind ) High Voltage Engineering by MG Niasar 2022-12-11 | A few of our students are now working on corona discharges and ionic wind. Luutzen wants to sample viruses from air using corona discharges. Peter and Immanual are BSc students and want to create an improved ionic propulsion system and Zhifeng is going to model corona discharges and ionic wind at high frequencies. I decided to demonstrate ionic wind using the famous experiment of candle flame in an electric field. My anemometer was not suitable to measure the speed of ionic wind created, so i decided to cut a paper piece and make a basic wind detector, forgetting the fact that paper will be attracted to the charged electrodes. At first when i saw paper was attracting to the electrodes, I was surprised that what a wind force. Later i did the experiment from behind the electrode and saw that the paper again attracted to the electrode but not fully. I realized my mistake and figured out how to explain it so to make sense. Life is so busy these days and i want to finish all task of 2022 before the end of the year. Wish me luck. Finance: N=66subs=2439Available budget (N): 2439-100-66*(66+1)=-2083Storage limit: 2^ln(2439)=222,75
Impact of air humidity on streamer length of a Tesla coil High Voltage Engineering by MG Niasar 2022-11-24 | We have two students who will work on alternative gases for replacement of SF6. Shruthi and Ewout. Their work is about investigating impact of air relative humidity and other contamination on breakdown strength and PD behavior of air, technical air, and C4F7N/CO2. That was the motivation to make this video. It seems we can directly observe that increase level of humidity increases the breakdown strength of air and hence lower the length of the streamer. Even though demonstration in this video is not as solid as possible, but qualitatively we could investigate the effect.Music from YouTube Audio library, Track name: Pontiac Shuffle Producer: ALBISFinance: N=65subs=2375Available budget (N): 2375-100-65*(65+1)=-2015Storage limit: 2^ln(2375)=218,69
Save +90% of your heating cost during the winter using an old Iranian technology ( Korsi کرسی ) High Voltage Engineering by MG Niasar 2022-11-06 | Winter 2022-2023 is coming and the gas price has increases significantly during the past few months. I thought some people might have issue paying their heating cost, hence they are going to suffer the cold of the winter. In this video I explain a very old Iranian method that you can use to stay warm during the cold months with very minimum electricity cost.This is called Korsi ( in Persian کرسی ), which is basically a wooden table of height ~0.5 meter and width and length of ~1 m. The table is covered with blanket and a heater (in modern days an electric heater, while in the past a pot filled with ash and fired charcoal). The reduced volume and less surface area of this space and high thermal resistance of the wall due to blankets, creates a small yet very warm space that only need a small amount of heat to stay very warm. You need to put your leg under it and stay warm during the day and night, also you can sleep under it and stay warm while other parts of your house is cold.if used properly, with only ~ 1-2 kwh you can stay warm for 24 h. It has some risks such as starting a fire, or burning your foot if you touch it to a hot heater, but in general is safe.Most Iranian people have used it in the past, but now a days due to widespread gas pipeline across the country, only is sometimes used in villages, or in case someone wants to renew the memories of the past. Finance: N=64subs=2293Available budget (N): 2293-100-64*(64+1)=-1967Storage limit: 2^ln(2293)=213,42
Charged particle tracing ( ray tracing ) in COMSOL Multiphysics High Voltage Engineering by MG Niasar 2022-10-30 | **Due to issues with editing software some unwanted sounds were added to the video after exporting the video**In this video I show you how to perform ray tracing in COMSOL Multiphysics. In this example en electron beam is passing through a uniform electric field and we compared the simulation results with analytical calculation. Exact same approach can be used to do ray tracing in an electrostatic lens system.In the next video i will talk about phase space distribution and how to select Emittance and Twiss parameters to achieve initial conditions for the beam release that we want.Finance: N=63subs=2256Available budget (N): 2256-100-63*(63+1)=-1876Storage limit: 2^ln(2256)=2011,03
Rice Engine v2 ( How to make an improved Thermoacoustic Heat Engine ) High Voltage Engineering by MG Niasar 2022-10-19 | Link to previous videos:youtube.com/watch?v=WwvOM8Sfztsyoutube.com/watch?v=Lyhylj5kHjwyoutube.com/watch?v=m-HlURJBLcwyoutube.com/watch?v=eSLsXvNivUIyoutube.com/watch?v=IEPiTa9XJAwIn my previous videos about the Thermo-acoustic heat engine I used a piece of steel wool, while in order to improve the performance of the engine i injected water into the engine. usually after 10s of times of operation eventually the steel wool get rusted and destroyed because of interaction with hot steam. I wanted to remove it or replace it with another material. After some work, and a hint from one of my commentators, i changed the design so that the heat engine works without steel wool. With this current design the engine is not going to go bad from internal material. the walls of the tin cans will rust at relatively low speed. The glass beads will last long.Only the piston has to be improved which i am working on it.With this video i show you how to make a new design of the Rice engine (even though i have not used rice inside the engine, but it is fair that the name stays rice engine)Finance: N=62subs=2197Available budget (N): 2197-100-62*(62+1)=-1809Storage limit: 2^ln(2197)=207,195
Self starting Thermoacoustic heat engine High Voltage Engineering by MG Niasar 2022-10-13 | In an attempt to improve the efficiency of my thermoacoustic heat engine, I made a taller engine with multiple cans. I tried to test the impact of different sizes of aluminum support structure on the performance of the engine, but the results were not conclusive.I figured out that it is important for the engine to have water vapor filled the whole volume. To achieve that I created a second hole on top of the engine so that when water is injected from the lower section, the vapor fills the cylinder and excess pressure exit from the top whole.This structure to my surprise resulted to a self-starting thermoacoustic engine, which is fantastic.Finance: N=61subs=2162Available budget (N): 2162-100-61*(61+1)=-1720Storage limit: 2^ln(2162)=204,90
Improvement of Thermoacoustic engine with glass beads (end of the Rice engine era) High Voltage Engineering by MG Niasar 2022-10-05 | link to my relevant previous videos:youtube.com/watch?v=WwvOM8Sfztsyoutube.com/watch?v=Lyhylj5kHjwyoutube.com/watch?v=m-HlURJBLcwThe rice engine although performs fanatically over short run, but its long term performance is very poor. The rice gradually get soften and sticks together, blocking the movement of air. This stops the engine functionality. the rice must be replaced and the wet rice also damage the steel wool, which after several time it also must be replaced. After experimenting with several replacement material (pasta, wheat, orange peel, small grains, etc.) I notices that size of these material plays a role. a size of 3-5 mm seems optimum. to have a robust material that does not burn, I decided to replace the rice with glass beads. This produce satisfactory results. The glass beads are not going to stick together and we will not have mold inside the engine. Furthermore, I placed a stainless steel wool in the lower section of engine so that more this more rust resistant layer be the first to have contact with vapor. normal steel wool is placed on top of it. With this the rice era is finished and now i will work to improve other aspects of the engine.Last week Hassan defended his master thesis. Congratulations Hassan and good luck. With this my last MSc student of 2021-2022 has graduated.Finance: N=60subs=2119Available budget (N): 2119-100-60*(60+1)=-1641Storage limit: 2^ln(2119)=202,06
Thermoacoustic engine (The Rice engine) makes very loud sound , Quarter Wave Resonator High Voltage Engineering by MG Niasar 2022-09-25 | Link to my previous videos related to the Rice engine: youtube.com/watch?v=WwvOM8Sfzts youtube.com/watch?v=Lyhylj5kHjw Following my investigation regarding the rice-based thermoacoustic engine, and after watching the following video: youtube.com/watch?v=dBqa5t8nefo I have modified my rice engine to create sound. Also, I have studied a bit about sound resonators and learned that a pipe that is closed on one side and open on another side is named a quarter-wave resonator and the frequency of resonance is very well known. I made the length of the rice engine variable using small cans that I have collected (I use to keep the cans when I finish eating their content to be able to do experiments such as this). using a mobile phone it was easy to analyze the sound frequency and magnitude. the experiment clearly showed that the formula for calculation of resonance frequency worked very well. very loud sound can be produced this way, I went up only to 105 dB to avoid bothering my neighbors. Finance: N=59subs=2075Available budget (N): 2075-100-59*(59+1)=-1565Storage limit: 2^ln(2075)=199,15
Themoacoustic heat engine (The rice engine) shakes my house High Voltage Engineering by MG Niasar 2022-09-17 | Playing around with my rice engine I decided to power it with my induction cooker instead of candles. Since the input power is much higher, the engine goes into crazy mode and shakes my whole room (exaggerating of course).This Theoacoustic engine has a lot of potentials, and a lot of science t learn from. If I would have seen such a thing when I was a child, I would have become a super famous scientist by now.Here is the link of the previous video, how to make the engine:youtube.com/watch?v=WwvOM8SfztsSeveral of my MSc students defended their thesis last month and only one is left. Jelle did it yesterday, congratulations Jelle. Ravi, Ashutosh, and Uwais defended at the end of August, they all did good work, so congratulations guys. Hassan is the last one which will defend next week on Wednesday. Good luck Hassan.Finance: N=58subs=2030Available budget (N): 2030-100-58*(58+1)=-1492Storage limit: 2^ln(2030)=196,146
How to make a thermoacoustic engine with a linear generator ( Rice engine ) High Voltage Engineering by MG Niasar 2022-09-11 | I was cleaning my house and saw a box full of my old rice engines and decided to demonstrate it to you guys. I saw the original design of this engine from another youtube video several years ago and I could not find the link to put it here. if I find it I ill place it in this part as a reference. This is a thermoacoustics engine that uses steel wool and rice as a regenerator and heat exchanger. Upgrade in the design and details of how it works will come in separate videos.Performance is fantastic and is a good classroom project for kids.Finally I found the original video:Moteur Stirling en 60 secondes. (Métronome résonnant)youtube.com/watch?v=c2ZquazrhU0Finance: N=57subs=2013Available budget (N): 2013-100-57*(57+1)=-1393Storage limit: 2^ln(2013)=195.00
Inductance calculation Part 2: inductance of a coaxial cable High Voltage Engineering by MG Niasar 2022-09-06 | This is the second video in my video series about inductance calculation. in the previous video I showed how to calculate inductance in Comsol using different methods, and we investigated inductance of a loop.youtube.com/watch?v=qSqgj5tvN7cIn this video we discuss inductance calculation of a coaxial cable. We will see how to measure inductance of a coaxial cable and we check the validity of the analytical high-frequency coaxial cable inductance formula with FEM simulation and actual measurement. Finance: N=56subs=1995Available budget (N): 1995-100-56*(56+1)=-1297Storage limit: 2^ln(1995)=193,79
Dry mango and papaya under the sun ( my first attempt ) High Voltage Engineering by MG Niasar 2022-08-23 | Our secretary (or nowadays called assistant manager) bought some dried mango and papaya from the market and offered me some, The papaya tasted very good and so initiated the idea that I should dry some mango and papaya myself. We had several warm days here in the Netherlands and so I bought three different types of mango and one papaya to dry them. Papaya I bought for the first time, it did not taste much when I tasted the fresh fruit, and when it was dried it tasted bad. Maybe this papaya was not ripe and not sweet.The dried mangos were good. Dried Pakistani mango had too much flavor and was not my favorite. The other types were better. In general, these fruits are expensive here, and drying them here does not make much sense. But the dried mongo tasted better than the dry mango that I can buy in the shops.So far Ayan, Nitish, and Cesar defended their MSC thesis, congratulations guys. Finance: N=55subs=1947Available budget (N): 1947-100-55*(55+1)=-1233Storage limit: 2^ln(1947)=190,55
Current distribution in a coaxial cable + proximity effect High Voltage Engineering by MG Niasar 2022-08-17 | I was going to make a video about the inductance of coaxial cables. It happens that the analytical formula for inductance calculation uses the inner radius of the outer conductor. The reason is that high frequency current flows near the inner surface of the outer conductor in a coaxial cable. so I decided to explain why this happens. To explain it I needed to use the phenomena of proximity effect, so I also discussed a bit about what proximity effect is and how it impacts current distribution in conductors.Finance: N=54subs=1918Available budget (N): 1918-100-54*(54+1)=-1152Storage limit: 2^ln(1918)=188.58
How to couple an electric circuit with a physical model in COMSOL Multiphysics High Voltage Engineering by MG Niasar 2022-07-31 | In this video, I show you how to couple an electric circuit with a physical model in COMSOL Multiphysics. in the first part, a simple example is used to demonstrate how to make and analyze an electric circuit in COMSOL. In the second part, I show you how to couple a physical model of a copper rod from magnetic field physics to an electric circuit consisting of a step voltage and a resistor. In the next video, I show you the comparison between the frequency-dependent model of the copper rod and when the model is analyzed at a fixed freuency. Finance: N=53subs=1837Available budget (N): 1837-100-53*(53+1)=-1125Storage limit: 2^ln(1837)=183.02
Coil winding machine with foot pedal ( semi-automated ), for Tesla coils and other types of windings High Voltage Engineering by MG Niasar 2022-07-19 | In this video, I show you how to make a robust but easy-to-make coil winding machine. it is not fully automated but it significantly reduces the time to create a winding. Especially if the wire is thin and many turns are needed like the secondary coil of a Tesla coil.Simple wooden blocks and a drill internal structure is used to make this winding machine. In a futur,e video I may upgrade the machine and show you the outcome.My university laptop burned a few days ago. Magic smoke came out of the fan. A fried inductor inside is visible. I am very keen to repair it since it still works with a battery, but when connected to power, the inductor gets super hot. Maybe it is a project for itself. Loads of master theses on the table, to be reviewed. Hot summer, and lots of work to do. A good dinner in Arnhem and a letter that put a smile on my face.Music: Night Snow by Asher Fulero, from Youtube audio library Finance: N=52subs=1772Available budget (N): 1772-100-52*(52+1)=-1084Storage limit: 2^ln(1772)=178,51
Capacitance calculation , part 1: capacitance between two conductors ( analytical and using COMSOL ) High Voltage Engineering by MG Niasar 2022-07-02 | Eventually I decided to make a video series about capacitance calculation. I plan to make this series the most comprehensive online video collection about capacitance and capacitors. First we go ahead with capacitance calculation and later I will expand the video series to topics of capacitors, their construction and complexities associated.In this first video I explain the basic definition and how to calculate capacitance between two conductors analytically and using FEM simulation in COMSOL Multiphysics. The example that I have used here to explain the basics is the most simple one i.e. a parallel plates capacitor.Calculation of matrix of capacitance for multi conductors scenario will be covered in the next video and thereafter I will talk about self-capacitance of a coil. Meanwhile I may cover capacitance calculation for more complicated simple systems, for example capacitance between two spheres, etc. By the way did you know that you can cite a Youtube video in your thesis or publication ? so in case the material of this video is useful for your work consider citing the video 😎.A while back I decided to choose some random Youtubers and try to gain more subscribers than them. Today i have passed the third channel.1- Carving Foam: when first passed him he had 269 subscribers, current subscribers 3652- Player cc: when first passed him he had 521 subscribers, current subscribers 5473- Aleksandar Haber: just passed him, current subscribers 1690Now the next channel will be "NOC16 March - May EC07". Currently he has 3.62K subscribers, so let see if/when I can take him over.Finance: N=51subs=1704Available budget (N): 1704-100-51*(51+1)=-1048Storage limit: 2^ln(1704)=173,73
Egyptian geese and their babies in front of my house ( Netherlands , Delft ) High Voltage Engineering by MG Niasar 2022-06-21 | These parent geese doing a great job every year. I shall learn :)Last week I went to Nord-IS 22 in Norwat, Trondheim, it was really fun and I got several ideas to work on for future publications. Hans and Nathaniel were also there. Always refreshing to see them and talk to them. I promised Hans that if one day I win a Nobel price, I will ask him to accompany me in the award ceremony :) Philip presented our paper and we laughed a lot during an evening dinner. What a blessing to have such people around me.Finance: N=50subs=1643Available budget (N): 1643-100-50*(50+1)=-1007Storage limit: 2^ln(1643)=169,39
Single transistor self-oscillating circuitry with NPN or PNP transistors ( Joule thief ) High Voltage Engineering by MG Niasar 2022-06-09 | In this video I show you the basic schematic of a single transistor self oscillating circuitry. Among the hobbyist this is known as Joule thief circuitry. I show you how to make it with NPN or with PNP transistors. Impact of transistor type, base resistance and input voltage on the output waveform is shown. In a future video I will make a two transistor circuit and will compare the efficiency of that with a single transistor circuitry. Also a Matlab Simulink model of such circuitry will be built in the future.The fact that the circuit start by itself is interesting and makes this simple circuit very useful for DC/DC low power converters.Finance: N=49subs=1590Available budget (N): 1590-100-49*(49+1)=-960Storage limit: 2^ln(1590)=165,59
How to measure coupling coefficient between two coils / windings High Voltage Engineering by MG Niasar 2022-05-27 | In this video I briefly discuss how to measure coupling coefficient between two coils. Basics of coupled inductors is also shortly explained.Finance: N=48subs=1533Available budget (N): 1533-100-48*(48+1)=-919Storage limit: 2^ln(1533)=161,45
Frequency response analysis in MATLAB Simulink using linearization approximation ( + step response ) High Voltage Engineering by MG Niasar 2022-05-15 | In this video I show you how to do frequency response analysis in MATLAB Simulink using linearization approximation. In the previous video I showed how to do impedance measurement using impedance measurement block and state space method, but those methods only work when you use blocks from Simulink library. However, in some cases your model has components from Simscape library and so the previous method do not work. In the next video I will show you how to do simulation based frequency response estimation to validate the results obtained by linearized model or to obtain the frequency response when a non-linear component is in you model and when the lineaization approach does not work properly.Finance: N=47subs=1490Available budget (N): 1490-100-47*(47+1)=-866Storage limit: 2^ln(1490)=158,3
Impedance measurement in MATLAB Simulink ( using impedance measurement block and state-space model ) High Voltage Engineering by MG Niasar 2022-05-02 | In this video I show you how to measure impedance of a model built in MATLAB Simulink, using impedance measurement block as well as State-Space model. These methods works only if you use blocks from Simulink library, but if you use physical components for example from Simscape library, then model linearization and frequency response estimation can be used which I will cover in a separate video.This video is especially built for Mr Hassan.You can find more information from the following link:nl.mathworks.com/help/physmod/sps/powersys/ug/analyzing-a-simple-circuit.htmlFinance: N=46subs=1416Available budget (N): 1416-100-46*(46+1)=-846Storage limit: 2^ln(1416)=152,8
How to make Bamieh , a popular sweet in Iran during month of Ramadan ( طرز تهیه بامیه در غربت ) High Voltage Engineering by MG Niasar 2022-04-25 | Bamieh is a sweet that is commonly sold together with Zolbia (in other countries known as Jilabi) during month of Ramadan. Today I decided to make some and open my fast eating them. In Iran we never made these at home since every confectionery sell them and it is easier to buy. Here some Turkish shops sell them but since a few years ago I decided to make it myself. It turns out not the best, but is okay. It is better to have the syrup a bit thicker (not like the one I made), but anyway for a boy this is already good.The HV channel has some randomness, different seemingly unrelated topics are covered, but they are part of my life. Hope people don't get bored.Finance: N=45subs=1387Available budget (N): 1387-100-45*(45+1)=-783Storage limit: 2^ln(1356)=150,63
How to clean glass stove top burnt marks High Voltage Engineering by MG Niasar 2022-04-18 | Eventually after 5 years I managed to clean the burnt marks on my stove top :). These burnt marks were there from the previous residents. Every time I wanted to clean it with normal detergent and sponge, I had no success. Today I wanted to make a video showing how to make some sweet snack, but then I looked at my stove and I decided to first clean it. After 30 minutes of unsuccessful attempt, suddenly I thought of using putty knives to scrape these dirt. Immediately after trying it I realized it is going to work. So I decided to put this video together. After searching on YouTube I saw so many videos about how to clean a stove-top, :). But anyway, this is my version.Finance: N=44subs=1356Available budget (N): 1356-100-44*(44+1)=-724Storage limit: 2^ln(1356)=148,29
