3D Composite Grids for Flow Computations: the Grid Generation

Abstract

Flow situations involving localized phenomena and 3D, complex geometries are very important and are often encountered in engineering applications in the aerospace, chemical and petroleum industries. Such geometries defy attempts to lay a single grid over the entire domain, for numerical solution of the problem using finite-difference methods. In a Composite Grid method, the domain is decomposed into overlapping regions which communicate at their boundaries. Each of these is individually transformed to a discrete, orthogonal parallelepiped grid. The transformed flow equations are then solved on these grids, in conjunction with the other grids which communicate with them, by using any of the wide variety of solvers including adaptive, multigrid versions. In this paper, we will describe the grid generation procedure, the data structure used to create the composite grid and some communication and other design issues.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1991
Accession Number
ADA252105

Entities

People

  • Joel Ferziger
  • Joseph Oliger
  • Ramana G. Venkata

Organizations

  • Stanford University

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Classification
  • Computational Fluid Dynamics
  • Computational Science
  • Computations
  • Differential Equations
  • Equations
  • Fluid Dynamics
  • Geometry
  • Language
  • Navier Stokes Equations
  • Notation
  • Parallel Processing
  • Parallel Processors
  • Partial Differential Equations
  • Petroleum Industry
  • Security
  • Two Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)

Technology Areas

  • Space