it's ok, I understand. well, I'm just gonna send you some pictures so you can understand my geometry and what I'm trying to do.

first of all, here is my geometry: 


this is a drying chamber made of wood with 2 trays as a porous media. air is heated at the bottom by

the mean of a horizontal absorber which is considered as a source of energy

The air flows into the dryer through an inlet, absorbs energy (heat) from the absorber (Aluminum), flows

through the drying chamber and outflows from the outlet.

trays were assumed as porous media for airflow. It is modeled by the power law model using C0 and C1.

boundary conditions in the inlet: P= 100000 Pa  and  T=304 K

boundary conditions in the outlet: P= 100000 Pa

Wooden wall boundary conditions: u=v=0

there is convective loss in all the walls and in the absorber,

the standard k-? model is used to describe the flow.

I know it's a lot but please be patient with me, and again I'm so grateful for keeping answering me

Best regards,