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-   -   wall shear stress in UDF (http://www.cfd-online.com/Forums/fluent/48985-wall-shear-stress-udf.html)

elisa August 11, 2008 01:07

wall shear stress in UDF
 
Hello everyone, I am writing an UDF in which I need to calculate the X wall shear stress. I know that there isn't a dedicated macro; one can just accesses to the velocity gradient vectors (G_U_G and G_V_G). Does anybody know how I can do? my simulation is laminar, 2d and my fluid is incompressible. Thank you very much for any help!

max August 13, 2008 08:36

Re: wall shear stress in UDF
 
hello Elisa

F_STORAGE_R_N3V(f,thread,SV_WALL_SHEAR) will return a vector for each face on wall boundaries with components representing the shear stresses in xyz-directions.

cheers Max


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