Uploaded October 2019 | Updated September 2026, 2 weeks ago
This is the first real step towards writing a panel code: the geometry. While the material in this video might seem trivial at first, it can actually be the most confusing part of the whole method since it involves a lot of tedious definitions of variables. If these variables aren't defined properly in your code, you'll get results that don't make sense.
In this video, I'll go through the panel method geometry in detail. We will use the simplest geometry, a circle approximated with 8 points (octagon), to define the variables. Then we will look at the Python code I wrote for both the circle and an airfoil. You can find the links to my Python and MATLAB programs in the CODE section below.
==== CODE =====
Panel Method Blog Post and Code (Python and MATLAB)
- Code can be downloaded at the bottom of the post
► joshtheengineer.com/2019/10/09/panel-method-geometry
GitHub: Panel Methods
► github.com/jte0419/Panel_Methods
==== RELATED VIDEOS/PLAYLISTS ====
Panel Methods YouTube Playlist
► youtube.com/playlist?list=PLxT-itJ3HGuUDVMuWKBxyoY8Dm9O9qstP
Panel Methods Overview Launch Page
► joshtheengineer.com/panel-methods
==== ERRORS ====
- If you find errors in the video, let me know and I'll add them here.
===== REFERENCES =====
Note: the links are Amazon affiliate links. If you do happen to want to buy the book and use the link below, it helps me out a little.
► Fundamentals of Aerodynamics, Anderson
amzn.to/3emVuXU
► Foundations of Aerodynamics, Kuethe and Chow
amzn.to/2yMg1Vi
► Theory of Wing Sections, Abbott and Doenhoff
amzn.to/2wvZyUt
This is the first real step towards writing a panel code: the geometry. While the material in this video might seem trivial at first, it can actually be the most confusing part of the whole method since it involves a lot of tedious definitions of variables. If these variables aren't defined properly in your code, you'll get results that don't make sense.
In this video, I'll go through the panel method geometry in detail. We will use the simplest geometry, a circle approximated with 8 points (octagon), to define the variables. Then we will look at the Python code I wrote for both the circle and an airfoil. You can find the links to my Python and MATLAB programs in the CODE section below.
==== CODE =====
Panel Method Blog Post and Code (Python and MATLAB)
- Code can be downloaded at the bottom of the post
► joshtheengineer.com/2019/10/09/panel-method-geometry
GitHub: Panel Methods
► github.com/jte0419/Panel_Methods
==== RELATED VIDEOS/PLAYLISTS ====
Panel Methods YouTube Playlist
► youtube.com/playlist?list=PLxT-itJ3HGuUDVMuWKBxyoY8Dm9O9qstP
Panel Methods Overview Launch Page
► joshtheengineer.com/panel-methods
==== ERRORS ====
- If you find errors in the video, let me know and I'll add them here.
===== REFERENCES =====
Note: the links are Amazon affiliate links. If you do happen to want to buy the book and use the link below, it helps me out a little.
► Fundamentals of Aerodynamics, Anderson
amzn.to/3emVuXU
► Foundations of Aerodynamics, Kuethe and Chow
amzn.to/2yMg1Vi
► Theory of Wing Sections, Abbott and Doenhoff
amzn.to/2wvZyUt

![Explained: NACA 4-Digit GUI Part 10/10 [MATLAB]
This is the last video in my 10-video series on coding a program in MATLAB to compute, display, and save a NACA 4-digit airfoil.
IN THIS VIDEO:
We add in the code for saving the airfoil data out to a text file. Both the LE to TE and TE to LE methods are coded. A comparison between the output from this code and the data from the UIUC airfoil data site (see link below) is made to confirm that our code works the way it should.
UIUC Airfoil Data Site:
http://m-selig.ae.illinois.edu/ads/coord_database.html
IN THIS SERIES:
Part 1/10 : https://goo.gl/9UBgbo
Part 2/10 : https://goo.gl/jRRcYJ
Part 3/10 : https://goo.gl/rSVLHo
Part 4/10 : https://goo.gl/HwHB39
Part 5/10 : https://goo.gl/AlDne8
Part 6/10 : https://goo.gl/7n1QP7
Part 7/10 : https://goo.gl/nTGleR
Part 8/10 : https://goo.gl/ez247P
Part 9/10 : https://goo.gl/8mXYcc
Part 10/10: https://goo.gl/ovBlbW
If youve made it this far, thanks for watching! I hope you enjoyed it. Let me know if you have any questions or comments. Explained: NACA 4-Digit GUI Part 10/10 [MATLAB]](https://i.ytimg.com/vi/kk-5MShSTwA/mqdefault.jpg)


![Explained: Afterburners
What are afterburners, and how do they work? In this video, Ill go into some detail on how different parts of the afterburner work, and why they are designed that way.
NOTES
► I always speak pretty quickly in my videos, so if you need to take it slower, you have the option of slowing down the video speed to 0.75x or even 0.5x the normal speed (I realize that I speak particularly fast in this video).
► Apparently since YouTube got rid of annotations, I have no way of letting you know in the video that I made a mistake, so Ill just have to hope that you read my video descriptions.
► At around 4:49, I say that droplet evaporation times are higher for higher temperatures. I meant to say that droplet evaporation times are higher for LOWER temperatures, which is why the cold bypass flow takes longer to evaporate droplets. Another way of saying this is that for the same droplet diameter, it will take longer to evaporate in a colder flow than in a hotter flow.
RELEVANT VIDEOS
→ In a Nutshell: Afterburners
https://goo.gl/fCxCqs
→ Area-Mach Number Relation
https://goo.gl/yNuu2t
REFERENCES
► Afterburners in The Aerothermodynamics of Aircraft Gas Turbine Engines, Zukoski
► Mechanics and Thermodynamics of Propulsion, Hill and Peterson
► Aerothermodynamics of Gas Turbine and Rocket Propulsion, Oates
► Aircraft Propulsion, Farokhi
► Aerospace Propulsion Systems, Ward
► Fundamentals of Jet Propulsion with Applications, Flack
THUMBNAIL PHOTO CREDIT
By United States Navy, Mass Communications Specialist 2nd Class Michael D. Cole [Public domain], via Wikimedia Commons Explained: Afterburners](https://i.ytimg.com/vi/mH3BBUpzj9c/mqdefault.jpg)

![Explained: Normal Vector [CFD]
This is a video describing the general technique of finding a vector normal to another vector, with an emphasis on its relation to CFD codes. Explained: Normal Vector [CFD]](https://i.ytimg.com/vi/mixm2y8ukTg/mqdefault.jpg)
![Explained: Line And Scatter Plot [Excel]
This video explains how to display both line data and scatter data on the same plot in Excel. Explained: Line And Scatter Plot [Excel]](https://i.ytimg.com/vi/nFylutP84ro/mqdefault.jpg)


