Mass flux update in simpleFoam and rhoSimpleFoam -- CFD Online Discussion Forums

June 14, 2021, 20:17	Mass flux update in simpleFoam and rhoSimpleFoam	#1
trailer Member Join Date: Mar 2021 Posts: 39 Rep Power: 5	Hello to all, I would like to know if anyone can clarify why the mass flux in simpleFoam is calculated as: Code: phi = phiHbyA - pEqn.flux(); And in rhoSimpleFoam: Code: phi = phiHbyA + pEqn.flux(); Why does the sign change?

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