Hi, Say you have a simulation of a nano particle resting on a flat surface of metals. It is described by the effective medium theory. How do you find the free energy of a face to be used in the Wulff construction. A suggestion i got was to use periodic boundary conditions in all directions, find the energy and then take periodic boundary conditions in only 2 directions. Substract the energies and divide by the surface area. Anyone got an idea which only involve Statistical physics, thermal physics or Classical mechanics?