An investigation of prediction accuracy of algebraic eddy-viscosity models considering pressure-diffusion process

Masashi Yoshio, Ken Ichi Abe

Research output: Contribution to journalArticle

Abstract

Some research groups have pointed out that the pressure-transport effect in the turbulence-energy transport equation becomes important for some kind of complex turbulent flows. Recent direct numerical simulation by Yao et al. (Theore. Comput. Fluid Dynamics, 14 (2001), 337-358) showed that the effect of the pressure-diffusion process was significant in a recirculating flow. In this study, three eddy-viscosity models (EVMs) were tested for a separated flow behind a rectangular trailing edge with or without the pressure-diffusion model proposed by Suga (/. Fluids Engng., 126 (2004), 634-641) thereby its effect was investigated in detail. The computational results elucidated that the pressure-diffusion model gave a definite influence on the predictive performance of EVMs, in particular in the recovery region downstream of the separation bubble. Furthermore, detailed discussion of each term of the pressure-diffusion model strongly recommended the usage of a nonlinear eddy-viscosity model.

Original languageEnglish
Pages (from-to)1532-1539
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume74
Issue number7
DOIs
Publication statusPublished - Jul 2008

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

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