[Paraview] wall shear stress

[Fande Kong]

Hi David,

Thanks very much for your reply. I am a new paraview user. Could you
possibly show me more details? Some documentations on each of these steps?

On Sun, Sep 18, 2016 at 5:39 PM, David Thompson <david.thompson at kitware.com>
wrote:

> Hi Fande,
>
> You should be able to use the gradient filter to compute the velocity
> gradient and examine the component of the gradient normal to the wall. That
> will be proportional to the shear stress at the wall. Is the wall aligned
> with a coordinate axis?
>

No, the wall is not aligned with a coordinate axis.  In fact, the geometry
is very complex. It is a pulmonary artery tree with several generations.

Thanks,

Fande,


> If not, you will need to extract the wall surface and generate normal
> vectors, then dot the gradient with the normal vectors.
>
>     David
>
> On Sep 18, 2016, at 16:01, Fande Kong <fdkong.jd at gmail.com> wrote:
>
> Hi Developers,
>
> I am solving an incompressible Navier-Stokes equations, and I have
> solutions for the velocity (u)  and the pressure (p). Is it possible to
> show the wall shear stress in paraview using the velocity?
>
>
> Fande Kong,
>
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