[Paraview] Fwd: Error to calculate vorticity with ParaView

[Andy Bauer]

I just checked with Gradient of Unstructured data set and it is working
fine with an analytic velocity field. Are you using a 2D or 3D grid? How
big are the differences? I would assume the difference is in how the
gradients are computed.

You can try using the Calculator filter to create a field like
"coordsY*kHat+coordsZ*iHat+coordsY*iHat" which should result in a vorticity
field of {1, 1, -1}. That's what I get for the output of both the Gradient
of Unstructured DataSet and Compute Derivatives.

Andy

On Fri, Jan 18, 2013 at 4:44 AM, Ana Emilia Rabelo <anaerabelo at gmail.com>wrote:

> hello,
>
> I'm trying to calculate the vorticity using the filters: Compute
> Derivative and Gradient of Unstructured data set, but it is not working,
> because when I compare it with Tecplot the results are different. Then I
> was wondering how I could calculate it and what would be the formula to
> calculate it using the python calculator or the calculator filter.
>
> Thank you,
> Ana Emilia Rabelo
>
>
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