Investigation of Particle-Turbulence Interactions Near Boundaries By Direct Numerical Simulation

本文的目的是建立一种双向耦合拟谱方法， 湍流流动的直接数值模拟 悬挂在墙上。 一个遵循拉格朗日的粒子- 将采用欧拉方法。 粒子效应将 通过组合的两步连续计算引入。 在第一步中，将模拟流体流场， 然后是围绕每个粒子的流动。 结果将 与两相流可视化结果相比， 层. 计算机程序可以处理大量的 湍流场中的粒子。 建议的直接数值模拟可能会导致一个 提高了对两相流微观结构的理解， 以及提供关于两相流的不同统计数据 适用于平均流中的本构关系 方程

The objective is a two-way coupling pseudo-spectral method for the direct numerical simulation of turbulent flow of suspensions near a wall. A particle following Lagrangian - Eulerian approach will be adopted. The particle effect will be introduced by a combined two-step successive computational. In the first step, the fluid flow field will be simulated, and then the flow about each particle. The results will be compared to two-phase flow visualization results in a boundary layer. The computer program can handle a large number of particles within a turbulent field. The proposed direct numerical simulation may lead to an improved understanding of the two-phase flow microstructure, as well as provide different statistics on two-phase flow useful for the constitutive relationships in the averaged flow equations.