Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Tensorial Time Scales for Turbulent Gradient Transport of Reynolds Stresses

레이놀즈 응력의 난류구배수송을 위한 텐서시간척도

  • 조중원 (한국과학기술원 기계공학과) ;
  • 김경연 (한국과학기술원 기계공학과) ;
  • 성형진 (한국과학기술원 기계공학과) ;
  • 정명균 (한국과학기술원 기계공학과)
  • Published : 2005.06.01
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Abstract

On the notion that the Reynolds stresses are transported with different time scale depending on the transport direction, the third order velocity correlations are represented by a new turbulent gradient transport model with tonsorial Lagrangian time scale. In order to verify the proposed model, DNS data are first obtained in a turbulent channel flow at Re = 180 and tonsorial Lagrangian time scales are computed. The present model predictions are compared with DNS data and those predicted by the third-order turbulent transport model of Hanjalic and Launder that uses a scalar time scale. The result demonstrates that the Reynolds stresses are indeed transported with different time scale depending on the transport direction.

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References

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