RNG Modeling of Turbulent Heat Flux and Its Application to Wall Shear Flows
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概要
- 論文の詳細を見る
In a previous paper[Phys.Fluids 9(1997)], we proposed an improved renormalization group(RNG)theory based on conditional iterative-averaging for turbulent flow with mean shear to derive an eddy-viscosity type turbulence model. In the present paper, we have applied this iterative-averaging RNG theory to the governing equation for a thermal field, and derived a thermal eddy diffusivity representation relevant to the turbulent heat flux. Furthermore, we have also obtained the RNG-based equation for the turbulent Prandtl number Pr_t, with a hogh Reynolds-number limit as Pr_t=0.79. The present RNG-based model is applied to the calculations of wall turbulent heat transfer. Agreement with the experiment and the direct simulation data is generally very satisfactory.
- 一般社団法人日本機械学会の論文
- 1998-08-15
著者
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Nagano Yasutaka
Department Of Environmental Technology And Urban Planning Graduate School Of Engineering Nagoya Inst
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ITAZU Yoshihiro
Department of Mechanical Engineering, Nagoya Institute of Technology
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Itazu Y
Department Of Mechanical Engineering Nagoya Institute Of Technology
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Itazu Yoshihiro
Department Of Mechanical Engineering Nagoya Institute Of Technology
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