한국전산유체공학회:학술대회논문집

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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압축성 박리 유동에서 Realizability 조건의 영향

INFLUENCE OF THE REALIZABILITY CONDITION ON TURBULENT SEPARATED FLOW SIMULATIONS

  • 박수형 (건국대학교 항공우주정보시스템공학과) ;
  • 사정환 (건국대학교 대학원 항공우주정보시스템공학과) ;
  • 김지웅 (건국대학교 대학원 항공우주정보시스템공학과)
  • 발행 : 2007.04.06
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초록

The realizability condition has been applied to modern turbulence models, Simulations are performed to compare ${\kappa}-{\omega}$ turbulence models imposing the realizability condition. An improvement to the ${\kappa}-{\varepsilon}$ turbulence model is also presented and shown to lead to better agreement with data for supersonic base flows. The improvement is achieved by imposing a grid-independent realizability constraint in the Launder-Sharma ${\kappa}-{\varepsilon}$ model. Numerical results for several test problems show a critical role of the realizability constraint in the prediction of separated flows.

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