Pritam singh


since on the top surface there is heat transfer by convection and also due to evaporation liquid is converted into vapor. So if I use pressure outlet or out flow boundary condition then i am not able to use these condition at the boundary. For applying these thermal condition at the top surface i considered it as a thin wall and then applied the convection boundary condition along with heat generation (loss of heat at the surface due to phase change), but once i made the top surface as wall then satifying continuity equation is not possible, because we are applying velocity inlet boundary condition so,  that much of fluid must be coming out of our domain and due to wall nothing can come out from the top surface. This is the ambiuity.