复式明渠三维数值模拟比较研究
首发时间:2006-10-12
摘要:本文采用计算流体力学软件fluent 模拟了不同断面形状的复式明渠的三维水流流动,对其水流结构进行了计算,主要包括断面主流速、床面剪切应力、紊动能及二次流的分布。紊流封闭采用两种紊流模型:标准的κ.ε紊流模型和雷诺应力模型(RSM)。计算结果和Ponnambalam Rameshwaran 的三维数值模拟的结果及原实验数据进行对比,结果表明雷诺应力模型模拟的结果更接近实验值,具有较高的精确度。
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COMPARISION OF 3-D MODELING APPROACHS FOR THE COMPOUND OPEN CHANNEL FLOW
Abstract:The flow in compound channels is investigated using the Computational Fluid Dynamics (CFD) code FLUENT. The distributions of primary velocity, bed shear stress, turbulent kinetic energy, Reynolds stresses and the turbulence-driven secondary currents are simulated. The flow simulations are performed by solving the three-dimensional Reynolds-averaged continuity and Navier-Stokes equations i) with the standard κ.ε turbulence model ii) with the Reynolds stress equation model. All the results are compared with those of the other simulation methods and the original data. It is shown that the simulation of RSM agreed with the experimental results better and is of high accuracy.
Keywords: compound open channel 3-D numerical simulation main velocity secondary currents
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No.8698764691160626****
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