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.
|ジャーナル||Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|出版ステータス||出版済み - 7 2008|
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