Name: Lecture 4: Reynolds number @bahgalabiitdelhi7797
Uploaded: 2017-01-17T01:29:31-0400
Duration: 8 min 17 s
Description: In this lecture, we will discuss the significance of Reynolds number and continue our discussion on non-dimensionalization of the governing equations.

Lecture 15: Folding and Periodicity of Discrete Fourier Transform (DFT) with an Example @bahgalabiitdelhi7797

Uploaded August 2020 | Updated September 2026, 1 day ago

In this lecture, we start with an example of evaluation of DFT. Motivated by this example, we discuss the concepts of folding and periodicity of the DFT spectrum. In particular, we show that if we have a discrete signal at N time instants, then the only meaningful frequencies are 0 to N/2 (in units of 1/dt).

Lecture 15: Folding and Periodicity of Discrete Fourier Transform (DFT) with an Example

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