Fluent两相模型高含沙模拟需要注意的几个问题  

Key Factors in Hyper-Concentrated Sediment Transport Simulation with Fluent C.F.D Package

作　　者：杨晨 陈鑫[2] 薛亮[3] 孙健[4] YANG Chen;CHEN Xin;XUE Liang;SUN Jian(North China University of Water Resources and Electric Power,School of Water Conservancy,Zhengzhou 450046,China;China Agricultural University,College of Water Resources and Civil Engineering,Beijing 100083,China;China University of Petroleum-Beijing,College of Petroleum Engineering,Beijing 102249,China;Tsinghua University,State Key Laboratory of Hydroscience and Engineering,Beijing 100084,China)

机构地区：[1]华北水利水电大学水利学院,河南郑州450046 [2]中国农业大学水利与土木工程学院,北京100083 [3]中国石油大学(北京)石油工程学院,北京102249 [4]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《海洋技术学报》2020年第4期36-40,共5页Journal of Ocean Technology

基　　金：国家自然科学基金资助项目(51609244);河南省重点研发与推广专项资助项目(202102310219)。

摘　　要：本文应用Fluent软件通用两相模型,结合水利工程与水力机械中泥沙运动的特殊性及一些最新研究成果,提出了实现高含沙流动数值模拟需要特别关注的几个问题。在两相流控制方程方面,本文讨论了其适用范围,并指出了高含沙运动需要模拟的应力相关项,比较了泥沙应力项和通用模型固体应力项的一些差别。在紊流模型方面,本文介绍了高含沙浓度对水流紊动的抑制,以及一些偏向适用于泥沙运动的紊动理论。在边界条件方面,本文指出了高含沙与一般含沙流动边界的区别,重点介绍了传统壁函数受高含沙影响而存在的问题及可能改进的方向。Fluent软件通用两相模型可在水利工程及水力机械领域的高含沙等问题研究中得到更好的应用。Several key factors are proposed in the hyper-concentrated sediment transport simulation with Fluent C.F.D package based on the particularity of sediment and the latest research in present study.In the two-phase governing equations,special stresses for hyper-concentrated sediment transport are pointed out,while difference between sediment stress and general Fluent solids stress are compared.Turbulence hindered by the hyper-concentration sediment is introduced in two-phase turbulence model,as well as some turbulence theory bias used in sediment transport.Boundary differences between dilute and hyper-concentrated problems are mentioned.Special attention is focused on traditional wall function influenced by sediment and the improvement.The Fluent two-phase model could be expected better application for hyper-concentrated problems with above arisen factors in rivers,coastal and hydro-machinery engineering.

关 键 词：Fluent软件 两相流 泥沙运动 水利工程 

分 类 号：TV8[水利工程—水利水电工程]