A Solution-Adaptive Grid Generation Scheme for Atmospheric Flow Simulations

Numerical Grid Generation in Computational Field Simulations, Ed. M. Cross., B. K. Soni, J. F. Thompson, J. Hauser, P. R. Eiseman, Proceedings of the 6th International Conference, held at the University of Greenwich, pp.327-335, July 1998

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Abstract
Science Applications International Corporation (SAIC) has developed a novel hazardous dispersion model with support from the Defense Special Weapons Agency. The Operational Multiscale Environment model with Grid Adaptivity (OMEGA) is based on an unstructured prismatic grid. OMEGA has the capability to adapt its grid statically as well as dynamically. The grid can adapt to a set of user defined criteria such as shoreline, terrain, particle locations, and velocity deformation. A considerable reduction in CPU time is achieved by dynamically adapting the grid. This paper gives an overview of the OMEGA model, and describes the grid-generation scheme used by the model. To our knowledge, OMEGA is the only fully operational atmospheric model with spatial and dynamic grid adaptation capabilities.