Friction velocity
From CFD-Wiki
Dimensional analysis shows that at a wall a charateristic velocity, called the friction velocity, 
, can be defined in the following way:
Where 
is the wall shear stress and 
is the fluid density at the wall.
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Dimensional analysis shows that at a wall a charateristic velocity, called the friction velocity, , can be defined in the following way:
Where is the wall shear stress and is the fluid density at the wall.
