Solver-specific global communicator

kauraajn · November 25, 2019, 17:26

Hi all,

I am trying to run a multiscale application where one of my solvers is the scalar transport in OpenFOAM. To achieve the coupling between solvers, I found a library called MUI, which uses the multiple program multiple data mode of MPI to communicate between different solvers.

It is mandated by MUI that solvers should make no direct reference to MPI_COMM_WORLD for any of its own communications. Instead, a globally accessible MPI communicator must be defined to hold a solver-specific global communicator.

I do not have more than a bare-basic understanding of how MPI works, and would be really grateful if someone could help me with this. Thanks!

xpqiu · November 25, 2019, 23:06

This commits may help: https://github.com/OpenFOAM/OpenFOAM...e1546a51ecc090

kauraajn · November 26, 2019, 10:59

Thank you xpqiu. I'll look into it

November 25, 2019, 17:26	Solver-specific global communicator	#1
kauraajn New Member Kaushik Join Date: Jun 2019 Posts: 14 Rep Power: 6	Hi all, I am trying to run a multiscale application where one of my solvers is the scalar transport in OpenFOAM. To achieve the coupling between solvers, I found a library called MUI, which uses the multiple program multiple data mode of MPI to communicate between different solvers. It is mandated by MUI that solvers should make no direct reference to MPI_COMM_WORLD for any of its own communications. Instead, a globally accessible MPI communicator must be defined to hold a solver-specific global communicator. I do not have more than a bare-basic understanding of how MPI works, and would be really grateful if someone could help me with this. Thanks!

November 25, 2019, 23:06		#2
xpqiu New Member Qiu Xiaoping Join Date: Apr 2013 Location: IPE CAS China Posts: 14 Rep Power: 14	This commits may help: https://github.com/OpenFOAM/OpenFOAM...e1546a51ecc090 __________________ xpqiu q.giskard@gmail.com

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November 26, 2019, 10:59		#3
kauraajn New Member Kaushik Join Date: Jun 2019 Posts: 14 Rep Power: 6	Thank you xpqiu. I'll look into it