[Paraview] wallShearStress Calculation in Paraview

[Ezhilmathi Krishnasamy]

Hi Ahmet,

What you can do that is, use the filter name called extract surface.
once you get that surface either you can export those values in form of
from elements or from the points.

It might work, or you may get more clear explanation from this forum.

Cheers,
Mathi



On 6 December 2017 at 15:00, Ahmet Ahmet <ahmetskyland at gmail.com> wrote:

> Hello everyone,
>
> I have results with OpenFOAM including p,T,U outputs. Due to some reasons,
> I can't use wallShearStress or wallgradU utility in OF. So, I have to
> calculate it on Paraview. I saw many topics related to that on google, but
> I could not find a satisfactory answer. My case is 3-D, compressible and
> laminar but we can think about incompressible and may be 2-D.
>
> I think the most important part for WSS is to calculate velocity gradient.
> My unsolved problem is to calculate that. How can I calculate gradients on
> the wall? I have no-slip wall, that is u=0 and with *Gradient of
> Unstructured DataSet/Compute Derivatives *filters, I obtained 0 on the
> wall. I think the values in the nearest mesh to the wall should be
> accounted for. To do that, what should I do?
>
> *Note:*
>
>    1. The walls are not aligned with a coordinate axis. For this part, I
>    tried to extract the wall surface and generate normal vectors.
>    2. As an alternative to get directly on wall, I tried to get slice a
>    little bit over the wall surface and then take surface vector on slice then
>    gradient of unstructured dataset on surface vector. That gives me a result
>    but I am not sure it's true.
>
>
> This may be simple for you, sorry for that.
> Thank you in advance,
> Ahmet
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/
> opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/paraview
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/paraview/attachments/20171206/101e42be/attachment.html>