Download OpenFOAM-2.2.x.tar.gz and OpenFOAM-2.3.x.tar.gz from http://sourceforge.net/projects/centfoam

install in /opt/OpenFOAM/
$ ls /opt/OpenFOAM –> OpenFOAM-2.2.x  OpenFOAM-2.3.x  ThirdParty-2.2.x  ThirdParty-2.3.x

source normally or create module files: /etc/modulefiles/openfoam/2.2.x and 2.3.x
they look like (just execute the command module load openfoam/2.2.x before using that OpenFOAM version.

#%Module1.0####################################################################
##
##  openfoam/2.2.x modulefile
##
##  
##
proc ModulesHelp { } {
puts stderr ”\tAdd OpenFOAM 2.2.x environment by Björn Bergqvist.”
}

module-whatis   ”Adds OpenFOAM 2.2.x links, aliases and paths”

set home $env(HOME)
set user $env(USER)

## Add my bin directory to the path
append-path     PATH    /opt/OpenFOAM/ThirdParty-2.2.x/platforms/linux64Gcc/gperftools-svn/bin:/opt/OpenFOAM/ThirdParty-2.2.x/platforms/linux64Gcc/openmpi-1.7.2/bin:/opt/OpenFOAM/ThirdParty-2.2.x/platforms/linux64/gcc-4.7.2/bin:$home/OpenFOAM/$user-2.2.x/platforms/linux64GccDPOpt/bin:/opt/OpenFOAM/site/2.2.x/platforms/linux64GccDPOpt/bin:/opt/OpenFOAM/OpenFOAM-2.2.x/platforms/linux64GccDPOpt/bin:/opt/OpenFOAM/OpenFOAM-2.2.x/bin:/opt/OpenFOAM/OpenFOAM-2.2.x/wmake

## Set an environment variable
setenv   FOAM_APPBIN   ”/opt/OpenFOAM/OpenFOAM-2.2.x/platforms/linux64GccDPOpt/bin”
setenv   FOAM_APP   ”/opt/OpenFOAM/OpenFOAM-2.2.x/applications”
setenv   FOAM_EXT_LIBBIN   ”/opt/OpenFOAM/ThirdParty-2.2.x/platforms/linux64GccDPOpt/lib”
setenv   FOAM_INST_DIR   ”/opt/OpenFOAM”
setenv   FOAM_JOB_DIR   ”/opt/OpenFOAM/jobControl”
setenv   FOAM_LIBBIN   ”/opt/OpenFOAM/OpenFOAM-2.2.x/platforms/linux64GccDPOpt/lib”
setenv   FOAM_MPI   ”openmpi-1.7.2”
setenv   FOAM_RUN   ”$home/OpenFOAM/$user-2.2.x/run”

Update: recompile openmpi
I got a problem with mpirun on my 2.2.x installation so I had to recompile openmpi

Update: Errormessage:

$ mpirun -np 4 simpleFoam -parallel
————————————————————————–
It looks like opal_init failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during opal_init; some of which are due to configuration or
environment problems. This failure appears to be an internal failure;
here’s some additional information (which may only be relevant to an
Open MPI developer):

opal_shmem_base_select failed
–> Returned value -1 instead of OPAL_SUCCESS
————————————————————————–
————————————————————————–
It looks like orte_init failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during orte_init; some of which are due to configuration or
environment problems. This failure appears to be an internal failure;
here’s some additional information (which may only be relevant to an
Open MPI developer):

opal_init failed
–> Returned value Error (-1) instead of ORTE_SUCCESS
————————————————————————–

Problem solution

module load openfoam/2.2.x
cd /opt/OpenFOAM/ThirdParty-2.2.x
rm -r platforms/linux64Gcc/openmpi-1.7.2
./Allwmake

and

module load openfoam/2.3.x
cd /opt/OpenFOAM/ThirdParty-2.3.x
rm -r platforms/linux64Gcc/openmpi-1.6.5/
./Allwmake