shear stress utility

hulli · June 9, 2021, 08:37

Hi guys,

what are the units of the shear stress fields one can post-process in OF8 ?

m2/s2 ???

Thanks

Tobermory · June 10, 2021, 13:10

Depends on the solver. If it's a kinematic solver, like simpleFoam, then viscosity, pressure and other stresses are kinematic. So shear stress will have units m2/s2. If you are running a compressible solver, then it won't be kinematic and you will have the regular units of kg/m.s2.

PS - a simple check is to look at the tutorial for the solver, and check the units in the boundary files.

hulli · June 11, 2021, 04:42

... thank you so much that helps a lot ...

June 9, 2021, 08:37	shear stress utility	#1
hulli Member hulli graemer Join Date: Oct 2014 Posts: 48 Rep Power: 11	Hi guys, what are the units of the shear stress fields one can post-process in OF8 ? m2/s2 ??? Thanks

June 11, 2021, 04:42	thank	#3
hulli Member hulli graemer Join Date: Oct 2014 Posts: 48 Rep Power: 11	... thank you so much that helps a lot ...

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June 10, 2021, 13:10		#2
Tobermory Senior Member Join Date: Apr 2020 Location: UK Posts: 666 Rep Power: 14	Depends on the solver. If it's a kinematic solver, like simpleFoam, then viscosity, pressure and other stresses are kinematic. So shear stress will have units m2/s2. If you are running a compressible solver, then it won't be kinematic and you will have the regular units of kg/m.s2. PS - a simple check is to look at the tutorial for the solver, and check the units in the boundary files.