Flow with polynomial transport properties is being cooled down from the middle section wall of the pipe with porous zone (only symmetrical half of the channel is being modeled): project public link
Geometry was prepared with Salome software.
Results was post-processed on the local machine with ParaView software (dark background) and Simscale post-processor (last image).
Averaged temperature at the outlet (patchAverage utility result) - 352.32 K:
Temperature through velocity isolines: