What are the differences between chtMultiRegionFoam and chtMultiRegionSimpleFoam?
 

chtMultiRegionSimpleFoam is a steady state version of chtMultiRegionFoam. If we consider a common tutorial for example 'multiRegionHeater' for both solvers, except controlDict, fvSchemes, fvSolutions...are there any difference in any other files entry?

I wrote this post because I have successfully run chtMultiRegionFoam with a modified geometry but I couldn't run chtMultiRegionSimpleFoam with that geometry! I got several errors...

Thanks in advances