A New Approach to Validate Subgrid Models in Complex High Reynolds Number Flows.

Abstract

A dynamic sub grid model was developed by using a method that employed the scale similarity concept for validating the behavior of the subgrid models. Since the scale similarity approach can be used directly in the physical space, there was no need to employ spectral space information for implementing the subgrid model (although spectral space analysis was carried out to compare with past models). Thus, the new dynamic approach has potential for application to more complex flows. The key feature of the dynamic model is that it is a truly local model and does not require any type of averaging for a range of flow problems. The flow fields where no averaging was required are: (1) Taylor-Green flow, (2) decaying isotropic turbulence, (3) forced isotropic turbulence, (4) temporal mixing layers and, (5) free circular jet with axial entrainment.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1996
Accession Number
ADA317103

Entities

People

  • Suresh Menon

Organizations

  • Georgia Tech

Tags

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Boundary Layer
  • Chemical Reactions
  • Computational Fluid Dynamics
  • Computational Science
  • Correlation Analysis
  • Couette Flow
  • Energy Transfer
  • Fluid Dynamics
  • Fluid Flow
  • Large Eddy Simulation
  • Reynolds Number
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)

Technology Areas

  • Space