Adding a convective term -- CFD Online Discussion Forums

September 5, 2017, 11:17	Adding a convective term	#1
m.lahooti New Member Join Date: Nov 2011 Posts: 1 Rep Power: 0	Hello every one I have to add an aditional convective term to momentum equation as I shown below: d $\vec{U}$ /dt + div(rho* $\vec{U}\vec{U}$ )+div(rho* $\vec{U_1}\vec{U_1}$ )=RHS where $\vec{U_1}$ = $\vec{U}-\vec{U_b}$ and $\vec{U_b}$ is a bottom wall velocity and it is known and constant. actually $\vec{U_b}$ is a fluid relative velocity to bottom wall. I want to add this term to momentum equation and I prefer to deal with it implicitly. I know that to discretize div(rho* $\vec{U}\vec{U}$ ) implicitly I can use fvm::div(phi,U) but I am a little confused how to approach for div(rho* $\vec{U_1}\vec{U_1}$ ) Anybody has any idea? any at all! Thanx in advance Last edited by m.lahooti; September 5, 2017 at 23:03.

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