论文标题
基于拉格朗日湍流传输的雷诺压力的可推广理论
A Generalizable Theory for the Reynolds Stress, Based on the Lagrangian Turbulence Transport
论文作者
论文摘要
使用动量的拉格朗日传输，雷诺剪切应力可以用基本的湍流参数表示。从这种角度来看，雷诺应力梯度代表了流动动量的横向转运，并通过动量方程中的U2传输，压力和剪切力项平衡。我们将这种形式主义扩展到其他湍流参数，例如雷诺应力的对角线成分，也将其扩展到更复杂的流动（边界层流动，带有不利压力梯度和旋流的管道流动）。来自直接数值模拟（DNS）的数据用于验证这组完整的湍流传输方程，对所有组件和跨不同几何形状都具有良好的一致性和一致性。为湍流流提供了使用此完整的湍流传输方程的一个示例。
Using the Lagrangian transport of momentum, the Reynolds shear stress can be expressed in terms of basic turbulence parameters. In this view, the Reynolds stress gradient represents the lateral transport of streamwise momentum, balanced by the u2 transport, pressure and shear force terms in the momentum equation. We extend this formalism to other turbulence parameters such as diagonal components of the Reynolds stress, and also to more complex flows (boundary layer flows with adverse pressure gradients and pipe flows with swirl). Data from direct numerical simulations (DNS) are used to validate this full set of turbulent transport equations, exhibiting a good degree of consistency and agreement for all of the components and across different geometries. An example of the use of this full set of turbulence transport equations is shown for turbulent jet flows.
