Skin friction coefficient
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It is related to the momentum thickness as follows: C_f = 2(d theta)/ (d x) | It is related to the momentum thickness as follows: C_f = 2(d theta)/ (d x) | ||
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| + | An empirical relation you may use for comparison is: C_f = 0.0583/(Re )^0.2 | ||
Revision as of 17:46, 7 April 2008
The skin friction coefficient, 
, is defined by:
Where 
is the local wall shear stress, 
is the fluid density and 
is the free-stream velocity (usually taken ouside of the boundary layer or at the inlet).
It is related to the momentum thickness as follows: C_f = 2(d theta)/ (d x)
An empirical relation you may use for comparison is: C_f = 0.0583/(Re )^0.2
Someone should add some correlations and references for them here
