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Old   April 28, 2005, 16:27
Default viscous stresses
Chittur Venkat
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I have a question that is eluding an easy answer. Maybe somebody can help me. The question is quite straightforward.

Q) The viscous stress in a given direction is computed by the product of the stress tensor and the unit vector in the given direction. So, can the viscous stress normal to a wall be non-zero in the general case? Or must it only be zero, and the stress tensor take on appropriate values to satisfy this condition?
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Old   April 29, 2005, 09:31
Default Re: viscous stresses
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In the general case the normal viscous stress is non-zero. The importance of the normal viscous stress relative to other terms scales inversely with Re.
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