Hello,
I am making a simple case-study with OpenFOAM, I am using the CHT module.
My case consists in two 2D rectangular regions placed one over the other: in the lower one a fluid flows from left to right while the upper one is a solid. I am having big problems trying to make this set-up converge, so I tried to make some troubelshooting. In one attempts I tried to make the coupling just one directional: from the fluid to the solid. What I found is that it looks like the heat flux goes in the wrong direction: heat goes from the colder temperature to the hotter temperature. Here a contour from paraview to explain the problem (the fluid is at 400 K and the walls of the solid are imposed at 300K).
Note that in the channel the fluid heats up because of viscous dissipations, so it even makes sense that the heat exchange increases going toward the outlet… but the direction of the exchange should be the opposite.
I would like to ask what do you think is the problem and what I am doing wrong, I attach the two preciceDict files and the config
precice-config.xml (1.6 KB)
preciceDictSolid.txt (483 Bytes)
preciceDictFluid.txt (482 Bytes)