Algebraic Turbulence Modeling for Unstructured and Adaptive Meshes

Abstract

An algebraic turbulence model based on the Baldwin-Lomax model, has been implemented for use on unstructured grids. The implementation is based on the use of local background structured turbulence meshes. At each time-step, flow variables are interpolated from the unstructured mesh onto the background structured meshes, the turbulence model is executed on these meshes, and the resulting eddy viscosity values are interpolated back to the unstructured mesh. Modifications to the algebraic model were required to enable the treatment of more complicated flows, such as confluent boundary layers and wakes. The model is used in conjunction with an efficient unstructured multigrid finite-element Navier-Stokes solver in order to compute compressible turbulent flows on fully unstructured meshes. Solutions about singles and multiple element airfoils are obtained and compared with experimental data. (JHD)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1990
Accession Number
ADA227157

Entities

People

  • Dimitri J. Mavriplis

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Layers
  • Mechanical Properties
  • Mechanics
  • Pressure Distribution
  • Reynolds Number
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)