Hi, I am trying to model a heat sink heated from the bottom and exposed to convection from the top with 2 side adiabatic walls.

Can anyone tell me how do i specify the boundary type for the wall that is exposed to a constant heat flux?

hello heat flux at the boudary equal to total heat that should adsorbed by heat sink from system(equipment),in the Define\boundary condition\wall,you chose the heat flux and input the heat flux(w/m2)

mahjoob