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A unified particle model for fluid–solid interactions
Author(s) -
Solenthaler Barbara,
Schläfli Jürg,
Pajarola Renato
Publication year - 2007
Publication title -
computer animation and virtual worlds
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.225
H-Index - 49
eISSN - 1546-427X
pISSN - 1546-4261
DOI - 10.1002/cav.162
Subject(s) - smoothed particle hydrodynamics , computer science , rendering (computer graphics) , particle (ecology) , coupling (piping) , particle system , kernel (algebra) , mechanics , statistical physics , function (biology) , biological system , materials science , physics , artificial intelligence , geology , computer graphics (images) , mathematics , composite material , oceanography , combinatorics , evolutionary biology , biology
We present a new method for the simulation of melting and solidification in a unified particle model . Our technique uses the Smoothed Particle Hydrodynamics (SPH) method for the simulation of liquids, deformable as well as rigid objects, which eliminates the need to define an interface for coupling different models. Using this approach, it is possible to simulate fluids and solids by only changing the attribute values of the underlying particles. We significantly changed a prior elastic particle model to achieve a flexible model for melting and solidification. By using an SPH approach and considering a new definition of a local reference shape , the simulation of merging and splitting of different objects, as may be caused by phase change processes, is made possible. In order to keep the system stable even in regions represented by a sparse set of particles we use a special kernel function for solidification processes. Additionally, we propose a surface reconstruction technique based on considering the movement of the center of mass to reduce rendering errors in concave regions. The results demonstrate new interaction effects concerning the melting and solidification of material, even while being surrounded by liquids. Copyright © 2007 John Wiley & Sons, Ltd.