Error in vorticity calculation using curl function

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Turbulence Analysis
Turbulence Analysis 2021년 2월 2일
답변: Sai Sumanth Korthiwada 2022년 12월 22일
Hi,
I am comparing the vorticity contours evaluated from velocity data using matlab's curl () function and pivmat's vec2scal function
Though, in both method, I am getting the similar contour, but the vorticity values are not correct. Could somebody help me with this ??. Image 1 generated using curl() and 2 generated using pivmat's vec2scal function..

답변 (1개)

Sai Sumanth Korthiwada
Sai Sumanth Korthiwada 2022년 12월 22일
Hi,
The images attached in the query looks similar. However, the values of vorticity may differ as ‘curl()’ function is from MATLAB and ‘vec2scal()’ function is from PIVMat.
In ‘vec2scal()’ function, there is a scalar mode curl (or rot) : curl (z-component of vorticity field).
Try using ‘curl’ as an input argument to obtain the appropriate results. By default, if input argument ‘MODE’ is omitted, 'norm' (for a 2D field) or 'uz' (for a 3D field) is taken by default.

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