This article describes how to create a password free ssh connection to then use ssh with Simcenter STAR-CCM+.
starccm+ -server -rsh ssh -np 4 mysim.sim
ssh REMOTEHOST -n /install/STARCCM/17.02.007_01/STAR-CCM+17.02.007/star/bin/starccm+ -server
where REMOTEHOST and actual installation directory can of course vary.
Useful user guide sections: