气固两相各向同性湍流的自适应网格模拟  

Adaptive Grid Simulation of Gas-solid Two-phase Isotropic Turbulent Flow

作　　者：蔡汝武 熊琰 唐剑 栗晶[1] 柳朝晖[1] CAI Ru-Wu;XIONG Yan;TANG Jian;LI Jing;LIU Zhao-Hui(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;Institute of Nuclear Power Operations,Wuhan 430074,China)

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074 [2]核动力运行研究所,武汉430074

出　　处：《工程热物理学报》2022年第2期431-436,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51876076);中核集团青年英才计划。

摘　　要：气固两相湍流是一个复杂的多尺度,多物理场的难题。为了捕捉流场的小尺度涡以及其对颗粒的作用,传统上采用了静态的高分辨率网格,消耗极大的计算资源。本文基于小波算法对网格进行加密或疏化,从而实现网格的自适应。基于自适应网格的框架上,建立颗粒与流场分块的映射,搭建了欧拉–拉格朗日的气固两相流模拟的并行平台。通过对均匀各向同性湍流的验证,在网络压缩率以及颗粒并行通讯上有着较好的性能,在高效模拟气固两相流领域有着良好的前景。Gas-solid two-phase turbulence is a complex multi-scale and multi-physics problem.In order to capture the small-scale vortices of the flow field and their effects on particles,a static high-resolution grid is traditionally used,which consumes huge computing resources.This paper is based on wavelet algorithm to refine or coarse the grid,so as to realize the self-adaptation of the grid.Based on the framework of an adaptive grid,a block mapping of particles and flow fields is established,and a parallel platform for Euler-Lagrangian gas-solid two-phase flow simulation is built.Through the verification of isotropic turbulent flow,it has good performance in grid compression rate and particles parallel communication,and has a good prospect in efficiently simulating gas-solid two-phase.

关 键 词：自适应网格 气固两相流 颗粒 均匀各向同性湍流 

分 类 号：TK123[动力工程及工程热物理—工程热物理]