\r周志博^{1, 2}，张庆河¹，张金凤\r¹\r
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AuthorsHTML:\r周志博^{1, 2}，张庆河¹，张金凤\r¹\r
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AuthorsListE:\rZhou Zhibo^{1, 2}，Zhang Qinghe¹，Zhang Jinfeng\r¹\r
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AuthorsHTMLE:\rZhou Zhibo^{1, 2}，Zhang Qinghe¹，Zhang Jinfeng\r¹\r
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Unit:\r1. 天津大学水利工程仿真与安全国家重点实验室，天津 300072；
2. 交通运输部天津水运工程科学研究院海洋水动力研究中心，天津 300456\r
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Unit_EngLish:\r1. State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 300072，China；
2.Center for Ocean Hydrodynamics Research，Tianjin Research Institute for Water Transport Engineering，Ministry of Transport，Tianjin 300456，China\r
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Abstract_Chinese:\r将壁面自适应局部涡黏(WALE)模型引入三维格子玻尔兹曼模型，对沙纹床面上的振荡流边界层运动进行了模拟，并与Smagorinsky 模型的模拟结果进行了比较．结果表明，在振荡流沙纹床面模拟中，WALE 模型与Smagorinsky 模型均获得与已有实验结果吻合较好的垂向流速剖面，但WALE 模型可以更好地反映粗糙紊流的特性.引入WALE 模型的LB 模型模拟得到的沙纹床面形状摩阻系数和肤面摩阻系数结果与前人数模结果一致，床面总摩阻力中形状摩阻相比肤面摩阻占主要部分.该模型可进一步应用于振荡流作用下沙纹床面紊流边界层运动特性的系统研究.\r
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Abstract_English:\rA three-dimensional lattice Boltzmann model combined with wall-adapting local eddy-viscosity(WALE)model was developed. Simulations of oscillatory boundary layer flow over rippled bed were carried out. The results from WALE model and Smagorinsky model were compared. The comparison indicates that both WALE model and Smagorinsky model can obtain vertical velocity profiles which agree well with the existing experimental data，but WALE model is more feasible to solve the characteristics of rough turbulence. The form friction factor and skin friction factor of rippled bed obtained from LB model combined with WALE model are consistent with literature. Compared with skin shear stress，form shear stress is dominant in total stress. The model can be further used to systematically study the characteristics of oscillatory turbulent boundary layer flow over rippled bed.\r
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Keyword_Chinese:沙纹；振荡流边界层；格子玻尔兹曼方法；大涡模拟\r

Keywords_English:sand ripple；oscillatory boundary layer；lattice Boltzmann method；large-eddy simulation\r


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