[OpenFOAM] How to calculate flux across the patch -- CFD Online Discussion Forums

October 23, 2008, 17:02	How to calculate flux across the patch	#1
unit New Member Evgeniy Redekop Join Date: Mar 2009 Posts: 5 Rep Power: 17	Hello. My field variable is a scalar (concentration). I need to calculate the flux (which is -grad(C)) across one of the patches. I could use patchIntegrate utility for integration over the patch but I need gradient field for that. foamCalc utility can calculate div(U) but only for vector fields. Is there a way to automatically calculate the field of gradients having the field of scalar? Thank you, Eugene

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