A new low-Reynolds-number k-ϵ-fμ model for predictions involving multiple surfaces
A new low-Reynolds-number k-ϵ-fμ model for predictions involving multiple surfaces
复制标题
一种新的低雷诺数 k-ϵ-fμ 模型，用于涉及多个表面的预测
DOI：
10.1016/s0169-5983(96)00047-0
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
H. Sung
中科院分区：
文献类型：
--
作者：
T. Park;H. Sung
本文提出了一个新的k-ε-f μ湍流模型，该模型考虑了不考虑距离的近壁效应和非平衡效应。在该模型中，f μ方程考虑了一般坐标系下的非局部近壁效应，而ε方程则引入了强应变湍流的局部各向异性。本模型的近壁特性是从DNS数据中确定的。此外，验证探索分离和重附着流。选择后向台阶流作为本模型的基准试验，评估了模型对复杂表面流动的响应。本模型的预测与现有的测量检查。模型的性能一般是令人满意的。
A new k-epsilon-f μ turbulence model is proposed, in which the near-wall effect without reference to distance and the non-equilibrium effect are incorporated. In this model, the non-local near-wall effect in a general coordinate system is taken into account by the f μ equation, and the local anisotropy in strongly strained turbulent flows in introduced in the epsilon equation. The near-wall characteristics of the present model are ascertained from the DNS data. Also, the validation is explored to separate and reattaching flows. The backward-facing step flow is selected for benchmark test of the present model and the response of the model to flows involving complex surfaces is assessed. The predictions of the present model are checked with the existing measurements. The model performance is shown to be generally satisfactory.