Roughness Height of a wall -- CFD Online Discussion Forums

December 17, 2009, 15:13	Roughness Height of a wall	#1
Vijay New Member Vijay Join Date: Mar 2009 Posts: 21 Rep Power: 17	How to estimate the surface roughness of a wall if nothing is known except the free stream velocity and the type of material (Coal). How to calculate the friction coefficient for an turbulent flow with high roughness walls.

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