zeroGradient on inlet -- CFD Online Discussion Forums

June 6, 2011, 05:30	zeroGradient on inlet	#1
NewFoamer New Member Join Date: Aug 2010 Posts: 14 Rep Power: 15	It seems fairly general that one sets the normal-component of the pressure gradient equal to zero on inlets. And then set a fixed-value for the velocity on the inlet. What is the physical reasoning behind this zero-gradient pressure BC? Is it an approximation?

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