Hi DrAmine,
I guess, you are asking for the model of interior? please have a look at the below snapshot. This part is mentioned as "interior-solid(interior, id=2)" under the boundary condition "internal".
when I tried to edit it, the dialogue box does not have any option. please have a look into it.
Hi Rob
From what you explained, I can say that concentration gradient is what drives the air to flow in case of gas sensors.
I guess, you are asking for the model of interior? please have a look at the below snapshot. This part is mentioned as "interior-solid(interior, id=2)" under the boundary condition "internal".
when I tried to edit it, the dialogue box does not have any option. please have a look into it.Hi Rob
From what you explained, I can say that concentration gradient is what drives the air to flow in case of gas sensors. 
You are navigating away from the AIS Discovery experience