[Andrev]

Dear Foam's,

Im trying to set heat flux as a boundary condition of my buoyantboussinesqSimpleFoam case. But my solution is too dependent of the mesh resolution, as I refine my mesh the final temperature of the fluid descreases each time more.

Qflux = k*(gradT)
gradT = qflux/k ; k=0,17 , Qflux = 10000

so Im setting in the T file :

fixedWalls
{
type fixedGradient;
gradient uniform 58823;
}

Can anyone tell me what am I doing wrong ?

Thanks for the attention.