A Far-Field Non-Reflecting Boundary Condition for Two-Dimensional Wake Flows.

Abstract

Far-field boundary conditions for external flow problems have been developed based upon long-wave perturbations of linearized flow equations about a steady state far field solution. The boundary improves convergence to steady state in single-grid temporal integration schemes using both regular-time-stepping and local-time-stepping. The far-field boundary may be near the trailing edge of the body which significantly reduces the number of grid points, and therefore the computational time, in the numerical calculation. In addition the solution produced is smoother in the far-field than when using extrapolation conditions. The boundary condition maintains the convergence rate to steady state in schemes utilizing multignd acceleration. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1995
Accession Number
ADA301994

Entities

People

  • Eli Turkel
  • Jeffrey S. Danowitz
  • Saul A. Abarbanel

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Convergence
  • Differential Equations
  • Equations
  • Extrapolation
  • Far Field
  • Fluid Dynamics
  • Free Stream
  • Geometry
  • Navier Stokes Equations
  • Steady State
  • Trailing Edges
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.