CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   OpenFOAM Post-Processing (https://www.cfd-online.com/Forums/openfoam-post-processing/)
-   -   please help me understand the output of wallShearStress (https://www.cfd-online.com/Forums/openfoam-post-processing/226613-please-help-me-understand-output-wallshearstress.html)

New-to-CFD May 2, 2020 13:55

please help me understand the output of wallShearStress
 
1 Attachment(s)
Hello,

I'm very new to openfoam and developing some post-processing / sampling functionality for my cases.

Things are working out well, but I was wondering if you guys could help me understand the output of the wallShearStress function

currently, I am running it like:

Code:

postProcess -func "wallShearStress"
and it outputs something that looks like this:

Attachment 77147

granted the results aren't very interesting, I'm just trying to get the functionality down for when I need it.

Can someone help me understand what the actually output is, and units? Assuming Pa?

I tried to look in the documentation/api docs but I'm getting a 404 error on some webpages and can't seem to find the output description anywhere?

What exactly are these numbers :) ?

Also, if anyone can tell me how to only calculate wallShearStress on a specific patch, that'd be great...currently when I do something like:

Code:

postProcess -func "wallShearStress(name=bottom)"
it just says:

Code:

wallShearStress wallShearStress:
    processing all wall patches


at some point I will want to only sample a specific patch...how can I do this??

OFv1912

Thanks all.

Yann May 4, 2020 05:37

Hi !


Have a look at the documentation of the wallShearStress function : https://www.openfoam.com/documentati...earStress.html


Cheers,
Yann


All times are GMT -4. The time now is 09:30.