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MUMMED November 29, 2013 15:59

Scalar shear stress expression
 
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Hi
I need to define an expression for calculating scalar shear stress on a rotating impeller.
I have to specify all six component of the stress tensor in this expression.
but I can specify 3 component ,I mean wall shear X,Y and Z.
how can i define zx,zy and xy component?
thanks for any response.

ghorrocks November 30, 2013 05:38

The usual definition is the sigma(xx)/(yy)/(zz) are the normal stresses and these are calculated from the pressure. The cross terms sigma(xy) are the tangential stresses which are from the wall shear stress.

mirzajani April 27, 2014 10:32

Hi
I have a problem. a cant expression shear stress and normal stress at cfd-post by polyflow solver, and velocity gradient at 3 narrow please help me?


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