[BSengupta]

Hallo Foamers!


I am using dbnsTurbFoam for my simulations. I need to find wallShearStress. I am trying to achieve it by two ways and failed in both.


Approach 1:
In controlDict:

functions
{
libs ("libfieldFunctionObjects.so");

tau
{
type wallShearStress;
executeControl writeTime;
writeControl writeTime;
}
}


Error:

-> FOAM FATAL ERROR:
Unknown function type wallShearStress

Valid functions are :

11
(
cellSource
faceSource
fieldAverage
fieldMinMax
maxFieldCell
minMaxField
probes
readFields
sets
surfaceInterpolateFields
surfaces
)



From function functionObject::New(const word& name, const Time&, const dictionary&)
in file db/functionObjects/functionObject/functionObject.C at line 94.

FOAM exiting



Approach 2:
After the simulation

dbnsTurbFoam -postProcess -func wallShearStress -latestTime

Error:



Usage: dbnsTurbFoam [-DebugSwitches key1=val1,key2=val2,...] [-DimensionedConstants key1=val1,key2=val2,...] [-InfoSwitches key1=val1,key2=val2,...] [-OptimisationSwitches key1=val1,key2=val2,...] [-Tolerances key1=val1,key2=val2,...] [-case dir] [-dumpControlSwitches] [-noFunctionObjects] [-parallel] [-help] [-doc] [-srcDoc]



--> FOAM FATAL ERROR:
Wrong number of arguments, expected 0 found 1
Invalid option: -postProcess
Invalid option: -func
Invalid option: -latestTime


FOAM exiting



Can anyone kindly help me to find wallShearStress.


Thanks a lot for your time.

[HPE]

Which version have you used?

Edit: FOAM-extend 4.0 might not possess that FO unlike the other versions.

[BSengupta]

Yes, I am using Extend 4.
How to solve this issue in Extend 4, any idea?


Thank you.

[HPE]

Take wallShearStress FO from either OF1906 or OF7, and compile it in extend.

[BSengupta]

wallShearStress -compressible


This works..