A scale-adaptive variant of the Spalart-Allmaras eddy- viscosity model

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

A method is presented for introducing scale-adaptive capabilities into the SpalartAllmaras one-equation turbulence model that allows it to resolve large-scale turbulent flow features. Unlike detached-eddy simulation, scale-adaptive methods dynamically respond to the resolved turbulent content without an explicit dependency on the local grid size, and the compatibility of the relevant length scales makes it more resilient to modeled stress depletion. The formulation is based on existing scale-adaptive models, comparisons of the relevant length scales in boundary-layer flows, and the desire to preserve the existing steady RANS capabilities of the model when appropriate. Results are presented that demonstrate the capabilities of the scale-adaptive Spalart-Allmaras variant and are compared to results using traditional unsteady RANS and detached-eddy simulation.

Original languageEnglish (US)
Title of host publication22nd AIAA Computational Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103667
DOIs
StatePublished - 2015
Event22nd AIAA Computational Fluid Dynamics Conference, 2015 - Dallas, United States
Duration: Jun 22 2015Jun 26 2015

Publication series

Name22nd AIAA Computational Fluid Dynamics Conference

Other

Other22nd AIAA Computational Fluid Dynamics Conference, 2015
Country/TerritoryUnited States
CityDallas
Period6/22/156/26/15

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

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