摘要
分汊河道水流计算方法研究,是准确模拟分汊河道水流运动,研究分汊河道泥沙运动、河道演变规律和水质变化规律的基础。选用三维RNG k-ε紊流模型,对长江镇扬河段世业洲汊道水流进行整体与局部的数值模拟,并采用刚盖假定法与VOF法分别对其自由表面进行处理,比较分析两种方法在分汊河道水流模拟中的差异。
The research on calculation method of braided stream is the base on simulating water flow accurately as well as studying sediment movement,evolution and water quality.In this article,three-dimensional RNG k-ε turbulence model is used for numerical simulation of water flow.The numerical simulation is performed at the braided water flow of Shiyezhou in Zhenyang reach of Yangtze River globally and locally.Meanwhile,rigid-lid assumption and VOF method are respectively used in processing water surface,through which the difference of these two methods in simulation of water flow in braided streams are compared and analyzed.
出处
《水科学与工程技术》
2012年第4期43-46,共4页
Water Sciences and Engineering Technology
关键词
分汊河道水流
数值模拟
VOF法
刚盖假定
整体与局部模拟
braided stream
numerical simulation
VOF method
rigid-lid assumption
global simulation and local simulation
