INDIANA UNIVERSITY PURDUE UNIVERSITY INDIANAPOLIS
	Computational Fluid Dynamics Laboratory

Parallel Computational Fluid Dynamics Conference 2000 Trondheim, Norway

(May 22-25,2000)

Parallel and Adaptive 3D Flow Solution Using Unstructured Grids

E. Yilmaz^a,   H.U. Aka ^a, M.S. Kavsaoglu ^b, and I.S. Akmandor^b

Abstract

        A parallel adaptive Euler flow solution algorithm is developed for 3D applications on distributed memory computers. The contribution of this research is the development and implementation of a parallel grid adaptation scheme together with an explicit cell-vertex based finite volume 3D flow solver on unstructured tetrahedral grids. Parallel adaptation of grids is based on grid-regeneration approach by using an existing serial grid generation program. Then, a general partitioner repartitions the grid. An adaptive sensor value, which is a measure to refine or coarsen grids at each node, is calculated considering the pressure gradients in all partitioned blocks of grids. The parallel performance of the present study was tested. Parallel computations were performed on Unix workstations and a Linux cluster using MPI communication library. It is proved that parallel adaptation is very effective for obtaining accurate and efficient flow solutions.