Non-conservation of momentum in the FMM method in the PHANTOM code
Abstract:
The article discusses the implementation of the fast multipole method (FMM) in the PHANTOM code. It has been demonstrated that for any given pair of mutual interaction cells in a kd-tree, Newton's third law holds. However, momentum is not preserved for the entire system as a whole.
Keywords:
smoothed particle hydrodynamics, SPH, tree code, fast multipole method, FMM, PHANTOM, N-body
Publication language:russian, pages:25
Research direction:
Mathematical modelling in actual problems of science and technics
