method for best approximation?

Laszlo

I would like to ask your help to select the best method for solving a flow problem.

There is an air channel 10mm x 2mm x 1mm and it is heated in a part of a channel. The air speed is between 0m/s and 50 m/s.

I would like to modell the effect of the heating to the velocity field and to the turbulence.

Do you think it will good approximate the real circumstances if I set the air material properties the following way: I set density as "ideal-gas" and set both viscosity and thermal conductivity as "kinetic-theory"?

What do you think which turbulence method gives the best approximation?

Thank you for your answer!