wallShearStress gives opposite sign
 

Hi all,

I'm simulating a flow around a structure on a rigid bed.
When I used
"wallShearStress"
I got results, which agree very well with what expected, BUT they are in opposite sign !!?
so, when multiplying by (-1), the results are correct.

Could you give me any hint?

Re=4*10e4
k-epsilon & k-omega-sst
wall functions

Thanks in advance.