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Wednesday, July 29, 2020 | History

3 edition of Parallel implicit unstructured grid Euler solvers found in the catalog.

Parallel implicit unstructured grid Euler solvers

Parallel implicit unstructured grid Euler solvers

  • 329 Want to read
  • 17 Currently reading

Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va .
Written in English

    Subjects:
  • Parallel processing (Electronic computers),
  • Partitions (Mathematics),
  • Lagrange equations.

  • Edition Notes

    StatementV. Venkatakrishnan.
    SeriesNASA contractor report -- 191594., ICASE report -- no. 94-4., NASA contractor report -- NASA CR-191594., ICASE report -- no. 94-4.
    ContributionsLangley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14705794M

    This article shows that for the classical problem of three-dimensional transonic Euler flow about an M6 wing, &#;NKS can simultaneously deliver globalized, asymptotically rapid convergence through adaptive pseudo-transient continuation and Newton's method; reasonable parallelizability for an implicit method through deferred synchronization. Understanding the Parallel Scalability of An Implicit Unstructured Mesh CFD Code W. D. Gropp 1, D. K. Kaushik, 2, and B. F. Smith 1 Math. & Comp. Abstract. In this paper, we identify the scalability bottlenecks of an unstructured grid CFD code (PETSc-FUN3D) by studying the impact of several algorithmic Since we are solving.

    A fast, matrix-free implicit method has been developed to solve the three-dimensional compressible Euler and Navier Stokes equations on unstructured meshes. An approximate system of linear equations arising from the Newton linearization is solved by the GMRES (generalized minimum residual) algorithm with a LU-SGS (lower upper symmetric Gauss. Domain-based Parallelization of an Unstructured-grid Incompressible Flow Code Dinesh K. Kaushik, David E. Keyes, and Barry F. Smith 1. Introduction The convergence rates and, therefore, the overall parallel e ciencies of addi-tive Schwarz methods are often notoriously dependent on subdomain granularity.

    parallel systems. Special attention has been paid to develop an optimally parallelized preconditioner for the GMRES scheme. 1. INTRODUCTION Considerable progress has recently been made in the development of implicit schemes for unstructured grids. The implicit methods are widely used to accelerate convergence of steady-state problems as well as to. FOR PARALLEL IMPLICIT CFD * Alternatively, the ability to solve implicit linear systems with the Jacobian, a by-product of Newton's method, can be exploited in deriving sensitivities. Motivated by While this paper (and its unstructured-grid companions [38, 44]) contributes some new, architecturally.


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Parallel implicit unstructured grid Euler solvers Download PDF EPUB FB2

Parallel implicit unstructured grid Euler solvers V. Venkatakrishnan Institute for Computer Applications in Science and Engineering, Hampton, Virginia Cited by:   A parallel, implicit, unstructured Euler/Navier-Stokes solver has been developed that is accurate, robust and user-friendly.

The parallel performance of the code is excellent, showing linear, and at times better than linear, scalability on the current parallel Cited by: A MIMD implementation of a parallel Euler solver for unstructured grids The Journal of Supercomputing, Vol.

6, No. 2 Large numerical linear algebra in the continuing influence of parallel computingCited by: As a result, implicit flow solvers usually display a loss of either computational or numerical efficiency as the number of utilized processors increases.

By far the most popular way of designing a parallel flow solver, whether it is based on a structured or an unstructured grid, has been to use some sort of multi block, or domain decomposition.

PARALLEL IMPLICIT UNSTRUCTURED GRID EULER SOLVERS V. Venkatakrishnan * Institute for Computer Applications in Science and Engineering MS C, NASA Langley Research Center Hampton, VA Abstract A mesh-vertex finite volume scheme for solving the Euler equations on triangular.

Parallel implicit iterative solution techniques are considered for application to a compressible Euler/Navier-Stokes solver using multidimensional upwind schemes on unstructured meshes. Numerical evaluation of the complete Jacobian matrix needed for the linearization process is first achieved at low cost, by finite-difference approximation.

Grid reordering is an efficient way to obtain better implicit convergence speed in viscous flow simulation based on unstructured grids. When performing parallel. However, the computational time for the unstructured grid solver is longer than its structured counterpart, due to the indirect addressing of the methods.

This has motivated the parallel implementation of the unstructured grid solver on parallel machine, IBM-SP2, with distributed memory.

The SPMD programming environment is adopted and the. “The Defining Methods of Cobalt A Parallel, Implicit, Unstructured Euler/Navier-Stokes Flow Solver,” AIAA PaperJanuary Mavriplis, D.J., “Unstructured Mesh Discretizations and Solvers for Computational Aerodynamics,”.

The development of unstructured grid-based, finite-element methods for the simulation of fluid flows is reviewed. The review concentrates on solution techniques for the compressible Euler and Navier-Stokes equations, employing methods which are based upon a Galerkin discretization in space together with an appropriate finite-difference representation in.

Implementation of a parallel unstructured Euler Solver on shared and distributed memory architectures. ICASE Reportappearing in Supercomputing ′92 proceedings and J. of Supercomp. Google Scholar. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): A mesh-vertex nite volume scheme for solving the Euler equations on triangular unstructured meshes is implemented on an MIMD (multiple instruction/multiple data stream) parallel computer.

An explicit four-stage Runge-Kutta scheme is used to solve two-dimensional ow problems. Book. Jan ; Newton-Krylov-Schwarz: An implicit solver for CFD Parallel implicit unstructured grid Euler solvers. Article. A MIMD implementation of a parallel Euler solver.

Implicit solvers for unstructured meshes. Journal of Computational Physics, â 91, [5] akrishnan. Parallel implicit unstructured grid Euler solvers. AIAA Journal, 32(10)âOctober [6] Steven d and Timothy Efficient massively parallel Euler solver for two-dimensional unstructured grids.

PARALLEL IMPLICIT UNSTRUCTURED GRID EULER SOLVERS V. Venkatakrishnan * Institute for Computer Applications in Science and Engineering MS C, NASA Langley Research Center Hampton, VA Abstract k mesh-vertex finite volume scheme for solving the Euler equations on triangular.

Get this from a library. Parallel implicit unstructured grid Euler solvers. [V Venkatakrishnan; Langley Research Center.]. outlines a finite-volume, unstructured-grid, nonhydrostatic, parallel coastal-ocean solver, which was built from the beginning to be a highly efficient code on parallel processors, under the name of the Stanford Unstructured Nonhydrostatic Terrain-following Adaptive Navier–Stokes Simulator (SUNTANS).

As the. On a Massively Parallel Euler Solver for Unstructured Grids', (). On the Solution of Nonlinear Hyperbolic Differential Equations by Finite Differences', (). Parallel Implicit Unstructured Grid Euler Solvers', Parallel Implicit Unstructured Grid Euler Solvers'.

A preconditioned directional-implicit agglomeration algorithm is developed for solving twoand three-dimensional viscous flows on highly anisotropic unstructured meshes of mixed-element types.

The multigrid smoother consists of a pre-conditioned point- or line-implicit solver which operates on lines constructed in the unstructured mesh using a.

Parallel implicit unstructured grid Euler solvers 1 Oct | AIAA Journal, Vol. 32, No. 10 Fully coupled finite volume solutions of the incompressible Navier-Stokes and energy equations using an inexact Newton method.

An Unstructured-Grid, Parallel, Projection Solver for Computing Low-Speed Flows Mark A. Christon and Daniel E. Carroll Computational Physics R&D Department Sandia National Laboratories M/SP.O.

Box Albuquerque, New Mexico This book has been formatted onto a CD-ROM and comprises sixty previously unpublished and peer-reviewed papers on the theory, problems and applications of computational fluid dynamics as advanced by parallel and supercomputing approaches covering a wide range of computers and configurations, including emergent software, new architectures, peta-flops scale machines .An Unstructured-Grid, Parallel, Projection Solver for Computing Low-Speed Flows CONF- sglow- - Mark A.

Christon and Daniel E. Carroll Computational Physics R&D Department Sandia National Laboratories M/SP.O. Box Albuquerque, New Mexico Summary.