Adaptive Tetrahedral Grid Refinement and Coarsening in Message-Passing Environments.

Hallberg, J. ; Stagg, A.

Technical Information Center Oak Ridge Tennessee

关键词: Grids;    Parallel processing;    Efficiency;   

RP-ID  :  DE2001766211

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A grid refinement and coarsening scheme has been developed for tetrahedral and triangular grid-based calculations in message-passing environments. The element adaption scheme is based on an edge bisection of elements marked for refinement by an appropriate error indicator. Hash-table/linked-list data structures are used to store nodal and element formation. The grid along inter-processor boundaries is refined and coarsened consistently with the update of these data structures via MPI calls. The parallel adaption scheme has been applied to the solution of a transient, three-dimensional, nonlinear, groundwater flow problem. Timings indicate efficiency of the grid refinement process relative to the flow solver calculations.