An adaptive Grid System for Structured Grids with arbitrary topology: Extension of the Parallel Multiblock Adaptive Grid System
by
Anand Madhavan
Mississippi State University, Engineering Research Center
Coauthors: Bharat K. Soni

The development and extension of the Parallel Multiblock Adaptive Grid System (PMAG) [1] is presented. The PMAG system is designed to do adaption concurrently with each block being solved in an individual process. These processes can be run on a single parallel machine or can be distributed over a network of processes. MPI is used as the message passing interface. PMAG has been extended to handle arbitrary block orientations and topologies. It is also extended for applications to Chimera grids. The grid adaptation is accomplished by redistribution of points using an elliptic system. Surfaces are modelled using Non-Uniform Rational B-Splines. The surface point redistribution is done using a separate NURBS parameter based elliptic system to maintain geometric fidelity. The weight functions have been improved to provide better adaption and feature capturing in high speed and/or chemically reacting flows. Several test cases with a variety of flow characteristics are exercised to demonstrate the algorithm. [1] Soni B. K., Thornburg H., Koomulil R., Apte M., Madhavan A.., " PMAG: Parallel Multiblock Adaptive Grid System", Proceedings of the 6th International Conference on Numerical Grid Generation in Computational Field Simulation, July 1998.

Date received: April 19, 1999

Copyright © 1999 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cacr-76.