离散型两相流动的大涡模拟  

Large-eddy simulation of dispersed two-phase flows

作　　者：周力行[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《中国科学：技术科学》2014年第2期162-171,共10页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:50606026;50736006和51266008)资助项目

摘　　要：大涡模拟(Large-eddy simulation,LES)的研究正在取得迅速进展.和雷诺平均模拟(Reynolds-averaged Navier-Stokes modeling,RANS modeling)相比,LES可以给出流动和火焰的瞬态结构,并且在不少情况下可以给出比雷诺平均模拟更准确的统计平均结果.本文作者及其同事从2002年开始,用大涡模拟研究了气泡-液体流动的瞬态结构.后来从2005年至今陆续研究了气体-颗粒两相流动的大涡模拟、气体绕过单个颗粒流动的大涡模拟、以及有蒸发和燃烧的油滴周围的流动的大涡模拟.本文对作者及其同事近期进行的上述离散型两相流动的大涡模拟研究给出了简要的综述,包括控制方程、亚网格模型、数值方法、主要的模拟结果及其实验验证.Large-eddy simulation （LES） is under its rapid development. In comparison with the Reynolds-averaged Navier-Stokes modeling （RANS modeling） LES can give instantaneous flow and flame structures and in some cases may give more accurate statistical results than RANS modeling. The present author and his colleagues started to study the instantaneous flow structures of bubbly flows by LES in 2002. Subsequently, from 2005 up to now the studies on LES of gas-particle flows, the flow structure surrounding a single particle, and the flow and flame structure surrounding an evaporating and combusting droplet were carried out. In this paper, a review will be given for some recent studies by the present author and his colleagues on LES of dispersed two-phase flows, including the governing equations, sub-grid-scale models and numerical methods, main research results and their experimental validation.

关 键 词：大涡模拟 气泡-液体两相流动 气体-颗粒两相流动 

分 类 号：O359[理学—流体力学]