Coupled solver energy equation problem
hi to all users,
my problem is about the use of coupled solver.
I have a rectangular duct of porous media, the top surface is heated with a heat flux, the bottom surface is adiabatic. if we use the segregated solver we don't have any problem, i obtain the convergence of the solution. While if i use the coupled solver with the same model (our boundary condition is the inlet velocity) i don't obtain the convergence of the solution; in particulary i find that the temperture field is not reasonable and the outlet mass flow (with the iterations) goes from the right value (the same of the inlet mass flow) to zero.
i don't understand why i have two different solution between the two solver.
P.S.: I have to use the coupled solver because my model need to use it (i have to use the gradient of temperature ).
Sorry for my English.
Thank to all.
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