/usr/lib/freefoam/libfoamCalcFunctions.so is in libfreefoam-dev 0.1.0+dfsg+1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/freefoam/libfoamCalcFunctions.so.1
/usr/lib/freefoam/libfoamCalcFunctions.so.1