/usr/lib64/openmpi/bin/netgen-mesher
/usr/lib64/openmpi/bin/ng_stl
/usr/lib64/openmpi/bin/ng_vol
/usr/lib/openmpi/bin/netgen-mesher
/usr/lib/openmpi/bin/ng_stl
/usr/lib/openmpi/bin/ng_vol
You may install this package on CentOS with
yum
install netgen-mesher-openmpi