Highly Accurate Prediction of Unsteady Viscous Flows

Abstract

This report describes a detailed investigation of the effects of computational accuracy on the prediction of shock wave/boundary layer interaction. In particular, the result of inaccuracies in the computation of the shock and the flow in its vicinity is studied. A new computational procedure computes all shocks as discontinuities while including all viscous effects. This scheme is used as a standard against which the accuracy of widely used shock capturing schemes is measured. The effect of the numerical error generated by spreading a shock over a few mesh intervals (instead of a few mean free paths) is evaluated with regard to shock/boundary layer interaction. We consider the spreading error, as well as the error produced by reducing the formal accuracy of these schemes near shocks (in order to eliminate wiggles). In this report, we present the computational scheme and results for a number of flow configurations.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1992
Accession Number
ADA250982

Entities

People

  • F. Marconi
  • Gino Moretti

Organizations

  • Grumman

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computations
  • Equations Of Motion
  • Fluid Dynamics
  • Fluid Flow
  • Inviscid Flow
  • Layers
  • Pressure Distribution
  • Reynolds Number
  • Shock Waves
  • Steady Flow
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.