[double_a]

Hi eddi,
I am also having trouble with parallel run of chtMRF, in my case a slight difference is that i am using the solver with view factor radiation model. when I run on 2 processors of the same machine/node , the performance is worse than for on 1 processor.
my mesh is only 500,000. cells (0.5 million), but still.
I am suspecting that it is because of the way the domain is decomposed.

can you tell me which method you are using for domain decomposition in the decomposeParDict file ?

and how can we decompose the domain according to the regions we already have , like fluid region goes to 1processor and solid region to another ?

Thanx.