wallShearStress vs. force functionObject
I have been simulating an impeller and extracting the power by using both wallShearStress utility (for moment calc. in paraview) and the force functionObject for gettting the moment directly.
Comparing the data I realized that the moment from viscous forces are in opposite direction, i.e. with wallShearStress utility and paraview I get the following moment from viscous forces
(0.300199 0.191866 1.55875)
while the force function object gives me
(-0.3002453 -0.1916713 -1.556391)
Looking at the code for wallShearStress and forces.c it seems that wallShearStress.C uses
do you already konw the answer?
i am not also have the same questiones
I donnot understand the difference to calculate visocus forces between wall shear stress and force utilities .the code are different but the result should be the same
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