Title: Pseudo-turbulence models for compressible flow through random particle suspensions Show Chinese title

Title: 随机颗粒悬浮液中可压缩流的伪湍流模型

Abstract: A model for the pseudo-turbulent Reynolds stress tensor in compressible flows through monodisperse particle clouds is developed based on data from particle resolved numerical simulations. This model extends previous models for the incompressible regime to subsonic bulk Mach numbers. A Lagrangian model for the local pseudo-turbulent Reynolds stress around a particle, based on the correlation of a local estimate of the Reynolds stress and the drag force on the particle, is also presented. This model can be employed in Euler-Lagrange type simulations. Additionally, corresponding models for the pseudo-turbulent transport of turbulence kinetic energy, the velocity triple-correlation in the volume averaged total energy equation, is also introduced as a first effort aimed at closing the energy equation. Show Chinese abstract

Abstract: 基于颗粒分辨数值模拟的数据，提出了一个适用于单分散粒子云中可压缩流伪湍动雷诺应力张量的模型。 该模型将先前用于不可压缩情形的模型扩展到了亚音速总体马赫数范围。 还提出了一种针对粒子周围局部伪湍动雷诺应力的拉格朗日模型，该模型基于雷诺应力的局部估计值与作用在粒子上的阻力之间的相关性。 此模型可用于欧拉-拉格朗日类型的模拟中。 此外，作为闭合能量方程的第一个尝试，还引入了相应的关于湍动能传输的伪湍动模型以及体积平均总能量方程中的速度三相关性模型。