Accession Number : ADA185631

Title :   Multitasked Embedded Multigrid for Three-Dimensional Flow Simulation.

Descriptive Note : Final rept.,

Corporate Author : INSTITUTE FOR SCIENTIFIC COMPUTING FORT COLLINS CO

Personal Author(s) : Johnson, Gary M ; Swisshelm, Julie M ; Pryor, Daniel V ; Ziebarth, John P

PDF Url : ADA185631

Report Date : Jun 1986

Pagination or Media Count : 8

Abstract : This project explored fast algorithms for Euler and Navier Stokes simulations. A particular issue pursued under the grant was the integration of an explicit three dimensional flow solver, embedded mesh refinements, a model equation hierarchy, multiple grid acceleration and extensive rectorization and multi tasking. Several papers were produced during this effort including such titles as 'Multitasked embedded multigrid for three-dimensional flow simulation' and 'Multigrid approaches to the Euler equations'. An efficient algorithm designed to be used for Navier stokes simulations of complex flows over complete configurations is described. The algorithm incorporates a number of elements, including an explicit three-dimensional flow solver, embedded mesh refinements, a model equation hierarchy ranging from the Euler equations through the full Navier-Stokes equations, multiple-grid convergence acceleration and extensive vectorization and multitasking for efficient execution on parallel processing supercomputers. Results are presented for a preliminary trial of the method on a problem representative of turbomachinery applications. Based on this performance data, it is estimated that a mature implementation of the algorithm will yield overall speedups ranging as high as 100.

Descriptors :   *NAVIER STOKES EQUATIONS, *THREE DIMENSIONAL FLOW, *COMPUTERIZED SIMULATION, ACCELERATION, ALGORITHMS, DIFFERENTIAL EQUATIONS, EFFICIENCY, EMBEDDING, FLOW, GRIDS, HIERARCHIES, MATHEMATICAL MODELS, MESH, PARALLEL PROCESSING, SUPERCOMPUTERS, TURBOMACHINERY

Subject Categories : Fluid Mechanics
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE