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How to extract wall shear stress of a turbulence flow?

Posted 18 nov. 2013, 12:53 UTC−5 Fluid & Heat Version 4.3b 1 Reply

Haitong Bai
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Hej,
I modeled a 3D turbulent flow, but I didn't find the expression of wall shear stress?

Is there any one knowing how to extract the wall shear stress in COMSOL?

Thank you
1 Reply Last Post 19 nov. 2013, 09:09 UTC−5
Julien Givernaud
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Posted: 1 decade ago 19 nov. 2013, 09:09 UTC−5
Hello,

I have tried also to measure normal shear stress to a boundary on a liquid solid interface in a 2D-axy model.
I have used a 1D plot group and have plotted: sqrt(spf.KStressn_avr^2+spf.KStressn_avz^2) [N/m^2] on the boundary. I think it's the right way to do but it needs a confirmation.

Julien
Hello, I have tried also to measure normal shear stress to a boundary on a liquid solid interface in a 2D-axy model. I have used a 1D plot group and have plotted: sqrt(spf.KStressn_avr^2+spf.KStressn_avz^2) [N/m^2] on the boundary. I think it's the right way to do but it needs a confirmation. Julien

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