Original code: https://github.com/briandrawert/SPH-BVF/ Fix Mechanics: https://github.com/briandrawert/SPH-BVF/blob/master/src/USER-SSA-TSDPD/fix_ssa_tsdpd_bvf_mechanics.cpp Pair Style Mechanics: https://github.com/briandrawert/SPH-BVF/blob/master/src/USER-SSA-TSDPD/pair_ssa_tsdpd_bvf_mechanics.cpp
