Heat-based bidirectional phase shifting simulation using position-based dynamics

摘要

Phase-change phenomena are present in our daily life. Examples are the evaporation of a fluid when it reaches its boiling temperature, the condensation of water vapor in air due to the pressure changes or due to the difference of temperature in boundaries, and the melting of snow when winter is ending. Current development in physics-based animation allows the simulation of these phenomena, but an integrated solution for modeling bidirectional phase-shifting objects is not available for games and other virtual environments. In this work we present a temperature-based method that drives phase transition phenomena based on latent heat of materials using position-based dynamics (PBD). Modifications to density, viscosity and distance PBD constraints are proposed to simulate the necessary thermal phenomena. Results show that melting, fusion, evaporation, condensation, dilation and even convection effects can be obtained by modifying the original PBD constraints in function of latent heat. (C) 2018 Elsevier Ltd. All rights reserved.