[Paraview] calculating the curl of a scalar field

[Andy Bauer]

Well, the curl of the gradient of a scalar field should always be zero,
assuming that the scalar field is twice differentiable. If you still want
to do that though you can do the following:

   1. Apply the Gradient of Unstructured Data Set filter on the scalar
   variable. You can leave the Result Array Name as Gradients.
   2. Use the Python Calculator filter's curl function. The expression will
   be "curl(Gradients)".


On Fri, Aug 21, 2015 at 11:38 AM, Kharche, Sanjay <S.R.Kharche at exeter.ac.uk>
wrote:

>
> Hi Andy
>
>
> Yes, I should rephrase.
>
>
> In my codes, I first calculate the spatial gradient of the scalar field.
>
> I need the curl of that at each FD location in my structured mesh.
>
>
> cheers
>
> Sanjay
>
>
> ------------------------------
> *From:* Andy Bauer <andy.bauer at kitware.com>
> *Sent:* 21 August 2015 03:25
> *To:* Kharche, Sanjay
> *Cc:* paraview at paraview.org
> *Subject:* Re: [Paraview] calculating the curl of a scalar field
>
> Hi Sanjay,
>
> How is the curl computed on scalar data? From my understanding, the curl
> must be done on a vector.
>
> Andy
>
> On Fri, Aug 21, 2015 at 8:58 AM, Kharche, Sanjay <S.R.Kharche at exeter.ac.uk
> > wrote:
>
>>
>> Hi
>>
>>
>> I have time series data of a scalar field. Is there any way I can use
>> paraview to calculate the curl of this
>>
>> scalar data?
>>
>>
>> cheers
>>
>> Sanjay
>>
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