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Evaluation of Turbulence Models for Thermal Striping in a Triple-Jet

[+] Author Affiliations
Seok-Ki Choi, Ho-Yun Nam, Myung-Hwan Wi, Seong-O Kim

Korea Atomic Energy Research Institute, Daejeon, Korea

Jong-Chull Jo

Korea Institute of Nuclear Safety, Daejeon, Korea

Hoon-Ki Choi

Changwon National University, Gyeongnam, Korea

Paper No. PVP2005-71512, pp. 867-873; 7 pages
doi:10.1115/PVP2005-71512
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 4: Fluid Structure Interaction
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4189-8 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

A computational study for the evaluation of the current turbulence models for the prediction of a thermal striping in a triple-jet is performed. The tested turbulence models are the two-layer model, the shear stress transport model and the elliptic relaxation model. These three turbulence models are applied to the prediction of the thermal striping in a triple-jet in which detailed experimental data are available. The performances of the tested turbulence models are evaluated through comparisons with the experimental data. The predicted mean and root-mean-square values of the temperature are compared with the experimental data, and the capability of predicting the oscillatory behavior of the ensemble-averaged temperature is investigated. From these works it is shown that only the elliptic relaxation model is capable of predicting the oscillatory behavior of the ensemble-averaged temperature. It is also shown that the elliptic relaxation model predicts best the time-averaged and root-mean-square of the temperature fluctuation. However, this model predicts a slower mixing at the far downstream of the jet.

Copyright © 2005 by ASME
Topics: Turbulence

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