水利水电科技进展2017，Vol.37Issue(4)：19-24,76,7.DOI:10.3880/j.issn.1006-7647.2017.04.004
三维交错沙波上的紊流特性数值模拟
Numerical simulation of turbulent characteristics over interlaced three-dimensional sand waves
摘要
Abstract
In order to investigate the structural characteristics of turbulent flow over sand waves on a complicated riverbed, a numerical model for simulating flow over three-dimensional sand waves was established using the Fluent software based on the Reynolds-averaged Navier-Stokes ( RANS ) equations and the k-ω turbulence model. The model was verified using experimental data. The results show that the established model can depict the turbulent characteristics over sand waves well. The three-dimensional properties of the sand waves are important factors influencing the turbulent structure of flow. The shear stress and bed form resistance are much more sensitive to the transversal phase difference φ2 than to the longitudinal phase difference φ1 . With the increase of φ2 , the sand waves become interlaced, and the shear stress and bed form resistance both decreased.关键词
三维沙波/k-ω模型/紊流/剪切应力/床面阻力Key words
three-dimensional sand waves/k-ω model/turbulent flow/shear stress/bed form resistance分类
建筑与水利引用本文复制引用
何立群,陈孝兵,陈力,赵坚..三维交错沙波上的紊流特性数值模拟[J].水利水电科技进展,2017,37(4):19-24,76,7.基金项目
国家自然科学基金(41401014,51279045) （41401014,51279045）
中央高校基本科研业务费专项(2016B03414) （2016B03414）
