) if r ij is within a cutoff distance r c , otherwise the potential nullifies. The variable ε describes the depth of the potential well and is a measure of interaction strength between two particles, while the value σ indicates the distance at which the potential energy is zero and is indicative of how close two particles can get. The LJ potential can be thought of as describing a repulsive force acting at small distances and van-der-Waals forces at larger distances. LJ Forces acting between different particles are calculated according to empirical mixing laws previously used in and based on . More precisely, the value for ε used to determine the force is based on the geometric mean,