Divergence in CHT Simulation

Hi @i033h276, thanks for posting!

By looking at the project you’ve shared, it seems like all runs converged except for the IBM run and that they were created after you’ve posted your initial topic. Could you share with the SimScale Community what was the solution you’ve found?

A quick comment on your project however: unlike the LED Spotlight Tutorial (see Advanced Concepts section), you’re defining your heat source as a Fixed value temperature:

Two comments on that:

  1. This will generate an “infinite heat source” scenario, since the walls will constantly be at 350ºC, no matter the environmental conditions around it. A better approach is to go for a power source advanced concept instead
  2. Since the rest of your walls will be adiabatic, there’s no way for the heat to leave the system, which means that the whole domain will be at thermal equilibrium at 350ºC

A final note is also that, if you’re expecting temperatures as high as 350ºC, you should toggle the compressibility option on for this study.

Cheers

Igor