Unable to output heat flux for rear wall stl region in MFIX-DEM

Hello,

I have followed the procedure of heat transfer from rotating drum but I am getting error to output the heat flux for this geometry.
Only rear wall is heated to a temperature. I want to output the heat flux from this wall.

Please help me to rectify the error.
I have attached the file below:

box_heat_transfer - Copy.zip (33.1 MB)

You have stl files but did not assign any BC to them so the cartesian grid cut cell is turned off (see output message). The side effect is DEBUG_CG is not allocated. You can allocate is manually:

      ALLOCATE(DES_QwFlux_Avg(DIMENSION_3, DIMENSION_M))

      if(.not.allocated(DEBUG_CG)) allocate(DEBUG_CG(DIMENSION_3,15))

      ! Zero arrays
      DES_QwFlux_Avg(:,:)=ZERO
      QW_SAMPLE_TIME = ZERO
      DEBUG_CG = ZERO

Thank you for your clarification.

I didn’t understand what is the sample time and how it’s calculating time averaged heat flux?

How do I get particular heat flux value from the wall when wall temperature is set to say 345.15K?