Particle Tracing in s-Transformed Grids Using Tetrahedral 6-Decomposition

Particle tracing in curvilinear grids often employs de composition of hexahedral cells into 5 tetrahedra. This method has shortcomings when applied to 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 transformed grids, however large the shearing. Results are presented of applying the technique to areal world simulation. Comparisons are made between the accuracy and speed of the 5-decomposition and the 6-decomposition methods.

@InProceedings { SBPM98a,
  author       = "Sadarjoen, Ari and Boer, A.J. de and Post, Frits H. and Mynett, A.E.",
  title        = "Particle Tracing in s-Transformed Grids Using Tetrahedral 6-Decomposition",
  year         = "1998",
  note         = "71--80",
  url          = "http://graphics.tudelft.nl/Publications-new/1998/SBPM98a"
}