Error in vorticity calculation using curl function

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Turbulence Analysis
Turbulence Analysis on 2 Feb 2021
Commented: darova on 14 Feb 2021
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..

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