UDF to access interior surface to calculate mass flow rate -- CFD Online Discussion Forums

August 11, 2015, 15:44	UDF to access interior surface to calculate mass flow rate	#1
shahjehan New Member Syed Shah Jehan Gillani Join Date: Oct 2014 Posts: 15 Rep Power: 12	Hi All I am working to adjust counter current boundary condition for an absorber model in which gas inlet is acting as liquid outlet. I studied forum and conclude scheme to work for counter current boundary conditions that I should calculate mass flow rate of liquid near bottom boundary and then adjust my bottom boundary through this calculated mass flow rate. problem I am facing that I could not access interior surface (that is actually a line in case of 2D geometry) thorugh UDF to calculate mass flow rate. Can any body help to sort out this problem?

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