This paper presents a method for animating gases on unstructured tetrahedral meshes to efficiently model the interaction of the fluids with irregularly shaped obstacles. Because our discretization scheme parallels that of the standard staggered grid mesh we are able to combine tetrahedral cells with regular hexahedral cells in a single mesh. This hybrid mesh offers both accuracy near obstacles and efficiency in open regions.

Feldman, B.E., O'Brien, J. F., Klingner, B.M, "Animating Gases with Hybrid Meshes." In Proceedings of SIGGRAPH 2005, Annual Conference Series, pages 904-909, Los Angeles, California, July 2005.

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