CFD Online Discussion Forums - wall shear stress from foam to fluent

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- - wall shear stress from foam to fluent (https://www.cfd-online.com/Forums/openfoam-post-processing/133790-wall-shear-stress-foam-fluent.html)

wall shear stress from foam to fluent

hello everyone
I have got wall shear stress quantities in openfoam220 as you can see here some of them

Code:

298)

(-0.00127718 -0.000404221 0.000533978)

(-0.00121755 -0.000385898 0.000510818)

(-0.00121095 -0.000383667 0.000508087)

(-0.00121859 -0.000385795 0.000510546)

(-0.0012234 -0.000387756 0.000512453)

(-0.0088624 -0.0029743 0.00632721)

(-0.00306619 -0.00136189 0.00492855)FoamFile

{

    version     2.0;

    format      ascii;

    class       volVectorField;

    location    "4.2";

    object      wallShearStress;

}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //



dimensions      [0 2 -2 0 0 0 0];



internalField   uniform (0 0 0);



boundaryField

{

    body

    {

        type            calculated;

        value           nonuniform List<vector> 

19650

(

(-0.00122343 -0.00038825 0.000512333)

(-0.00123169 -0.00039155 0.000516047)

(-0.00122192 -0.000388865 0.000512123)

(-0.00121797 -0.000387782 0.000510915)

(-0.00124789 -0.000398131 0.000522871)

(-0.0012472 -0.000399014 0.000524404)

(-0.00121061 -0.000387105 0.000509156)

(-0.00121566 -0.000388515 0.000511397)

(-0.00122399 -0.000392193 0.000514912)

(-0.001237 -0.000396912 0.000520762)

(-0.00123446 -0.000395865 0.000520842)

(-0.00122043 -0.000390811 0.000514863)

(-0.00121514 -0.000389146 0.000512908)

(-0.00121446 -0.0003887 0.000512529)

(-0.00124398 -0.00039817 0.000525058)

(-0.0012495 -0.000399893 0.000529001)

(-0.0012086 -0.000386552 0.00051086)

(-0.00121413 -0.000388711 0.00051398)

(-0.00122184 -0.000391079 0.000517966)

(-0.00122445 -0.000391132 0.000519367)

(-0.00122053 -0.000389247 0.000517773)

(-0.00122377 -0.000390382 0.000519449)

(-0.00121272 -0.000386449 0.000514925)

(-0.00120642 -0.000384427 0.000511844)

(-0.00124813 -0.000397558 0.000530109)

(-0.00124509 -0.000395547 0.000528736)

(-0.00122044 -0.000387612 0.000519085)

(-0.00121903 -0.000386442 0.000518498)

(-0.00121971 -0.000385916 0.000518287)

(-0.00121488 -0.000383792 0.00051596)

(-0.0012114 -0.000382735 0.000514048)

(-0.0012084 -0.000381126 0.000512874)

(-0.0012037 -0.000379369 0.000510334)

(-0.00120198 -0.000378896 0.000509345)

(-0.00124765 -0.000392743 0.000528433)

(-0.00124696 -0.000391626 0.000526389)

then I have used foamDataToFluent because I am about to get the wall shear stress contours in fluent but fluent shows me just zero ,:confused:is there anyone who can help?
thank you

Does fluent calculate the wall shear stress during postprocessing? If yes, you have to convert the input fields by foamDataToFluent using an appropriate foamDataToFluentDict including all the necessary fields.

Otherwise if fluent should use the values of the wall shear stress calculated by OpenFOAM it might be enough to modify foamDataToFluentDict to include a line for the wall shear stress. The "field number" for fluent seems to be 19, see
https://github.com/OpenFOAM/OpenFOAM...nitNumbers.txt
and
https://github.com/OpenFOAM/OpenFOAM...taToFluentDict

thank you
I have check whatever you said and everything was the same as you posted so I think fluent calculated wall shear stress during running however I am not sure about that .

According to https://github.com/OpenFOAM/OpenFOAM...umbers.txt#L27 the wall shear stress is in the fluent data file. So you have to convert your shear stress data like the other values of OpenFOAM to fluent. You have to find out, what to add to your foamDataToFluentDict.
Perhaps

Code:

wallShearStress 19

Hello jherb,

I have a problem regarding the WSS conversion from OpenFOAM to Fluent. Actually, I can obtain WSS results but when I convert the results to Fluent, then WSS values are seen to be zero, although they are not (I write "wallShearStress 19" in foamToFluentDict file). I don't know how to resolve that issue, could you please help me if you have any idea?