Particle Tracing in σ-Transformed Grids using Tetrahedral 6-Decomposition
Particle tracing in curvilinear grids often employs decomposition of hexahedral cells into 5 tetrahedra. This method has shortcomings when applied to σ-transformed grids, a grid type having strongly sheared cells, commonly used in hydrodynamic simulations. This paper describes an improved decomposition method into 6 tetrahedra. It is shown that this method is robust in σ-transformed grids, however large the shearing. Results are presented of applying the technique to a real world simulation. Comparisons are made between the accuracy and speed of the 6-decomposition and the 6-decomposition methods.
KeywordsParticle Trace Computational Fluid Dynamic Simulation Particle Path Hydrodynamic Simulation Computational Space
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