OpenFOAM

OpenFOAM Installation

Building OpenFOAM with cray-mpich and gcc

Instructions for installing OpenFOAM are available here.

In the instructions, you will be cloning the OpenFOAM folder which we will refer to as $OPENFOAM.

In order to build OpenFOAM with cray-mpich, two files need to be edited.

1. $OPENFOAM/etc/bashrc

   In this file, the variable WM_MPLIB will be defined as MPICH. Search for the line where the variable is exported and replace it with

   export WM_MPLIB=MPICH
   

2. $OPENFOAM/etc/config.sh/mpi

   This file defines where mpich is defined on the system. You will search for the mpich definition block and replace it with

   export MPI_ARCH_PATH=/opt/cray/pe/mpich/8.1.28/ofi/gnu/10.3
   export LD_LIBRARY_PATH="${MPI_ARCH_PATH}/lib:${LD_LIBRARY_PATH}"
   export PATH="${MPI_ARCH_PATH}/bin:${PATH}"
   export FOAM_MPI=mpich-8.1.28
   export MPI_HOME=/opt/cray/pe/mpich/8.1.28/ofi/gnu/10.3
   #export FOAM_MPI=mpich2-1.1.1p1
   #export MPI_HOME=$WM_THIRD_PARTY_DIR/$FOAM_MPI
   #export MPI_ARCH_PATH=$WM_THIRD_PARTY_DIR/platforms/$WM_ARCH$WM_COMPILER/$FOAM_MPI
   
   
   _foamAddPath    $MPI_ARCH_PATH/bin
   
   
   # 64-bit on OpenSuSE 12.1 uses lib64 others use lib
   _foamAddLib     $MPI_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH
   _foamAddLib     $MPI_ARCH_PATH/lib
   
   
   _foamAddMan     $MPI_ARCH_PATH/share/man
   ;;
   

Before you install OpenFOAM, make sure to load Prgenv-gnu. This will load gcc and cray-mpich. Make sure the same module is loaded at runtime.