[adib_mohammad]

I am trying to do 2d asysimmetric simulations of fuel pyrolysis a flow reactor with hot wall and laminar gas flow using reactingFoam. So, I created a axisymmetric mesh of simple pipe.
First, I ran the case with no chemistry to make sure velocity and temperature distribution are fine by setting

chemistry           off;

in constant/chemistryProperties file.

I also applied a constant temperature of on the wall and at the inlet.

I checked the results, and I noticed that there are not thermal or hydraulic boundaries are formed near the wall of the pipe, so heat does not diffuse from the hot wall to the gas!

Is there anyway to capture laminar diffusion in reactingFoam?