応力・熱流束モデルの特徴を反映した壁乱流と自由乱流に適用し得る温度場2方程式モデル

概要

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A new two-equation heat-transfer model which incorporates some essential features of second-order modeling is proposed. The present model is applicable to heat-transfer problems in both wall and free turbulent flows not unusually deviating from the equilibrium state. Furthermore, by introducing the Kolmogorov velocity scale, the model can appropriately express the low-Reynolds-number effects in the near-wall region, and is also applicable to complex heat-transfer fields with flow separation and reattachment. The proposed model predicts quite successfully heat transfer in both wall and free turbulent flows, i.e., a homogeneous isotropic decaying flow, a homogeneous shear flow, a boundary-layer flow heated from the origin, and a boundary-layer flow subjected to a sudden change in wall thermal conditions, whereas such predictions have been almost impossible with existing two-equation heat-transfer models.
一般社団法人日本機械学会の論文
1995-11-25