1714 温度成層乱流における密度変化の影響(J13 乱流とマルチフィジックスのモデリング,J13 乱流とマルチフィジックスのモデリング)

概要

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We propose a new numerical method extended from the usual incompressible scheme, taking into account the density variation to realize the turbulent heat transfer prediction accurately. For the assessment of the applicability of this method for the flow field where the compressibility is not negligible even in the case of low Mach number, the direct numerical simulations(DNS) of turbulent flow in a horizontal channel of different wall temperatures are carried out. Then the results for the turbulent flow under some conditions of unstable stratification are compared. The temperature profile was shifted in comparison with the result by Boussinesq approximation. Also, it was affected by the viscosity and thermal conductivity when temperature effect on them was considered.
社団法人日本機械学会の論文
2007-09-07