[Black Margician]

Hi SU2 community,

I've just started reading the su2 code and want to implement some algorithms in multizone solver. What I don't understand very well at the moment is the parallel approach for the multizone solver.

The first question is, for example, I now have three zones, each with the same number of mesh cells. If I want to use 12 cores to calculate, does that mean each zone will be assigned four cores?

My second question revolves around the execution order of these zones. Are the computations for different zones carried out concurrently, or are they processed sequentially according to their respective zone IDs?

I would appreciate any insights or clarifications on these matters. Thank you in advance for your support and guidance.

[bigfootedrockmidget]

Hi!
The multizone uses a segregated approach, so we do

while not converged
 iterate(zone1)
 iterate(zone2)

So each zone is independently decomposed into 12 mpi domains if you use 12 cores.


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[Black Margician]

Hi bigfoot,

Thank you for the explanation, it helped to solve the confusion I've been having.

Also, thanks for sharing the dev channel, I'm very happy to join the su2 dev group!