基于Youngs-VOF方法的垂向二维悬沙数值模拟  

Vertical 2-D numerical model of suspended sediment transport based on Youngs-VOF method

作　　者：赵东淼 唐军[1] 吴修广[3] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116023 [2]福建省港航勘察设计研究院,福州350002 [3]浙江省水利河口研究院,杭州310020

出　　处：《水力发电学报》2013年第6期99-103,134,共6页Journal of Hydroelectric Engineering

基　　金：国家重点基础研究发展计划项目(2013CB430403);国家自然科学基金项目(51279023;50709004);水利部公益性行业科研专项经费项目(201001072)

摘　　要：垂向二维水沙模型能够较好的反映水力特性和泥沙浓度沿侧向变化不大的区域的水沙运动。本文联合非线性k-ε紊流模型,由Youngs-VOF法追踪自由面,采用精度较高的ELVIRA自由面法向确立方法取代Youngs的方法,建立了一个对自由面非线性有着较强适应性的垂向二维泥沙紊流输运模型,并对非线性紊流方程、泥沙输运方程采用了垂向隐式、水平显式的power-law格式进行数值离散。将模型应用于单纯冲刷及淤积的水槽试验,通过实测资料和数值模拟结果的分析对比验证了模型的有效性。A vertical 2-D model of water and sediment reflects the characteristics of water and sediment movements quite well in the region of smaller lateral gradients of flow quantities and sediment concentration. In this paper, we present such a 2-D model for turbulent flow with nonlinear free surface. This 2-D model adopts a k-ε nonlinear turbulence model for 2-D solution of the flow governing equations and sediment transport equation, using implicit and explicit schemes for vertical and horizontal directions respectively. A Youngs- VOF method is used for free surface tracking, but it is modified by adopting an ELVIRA method for surface tracking in its normal direction. The model has been tested for the laboratory flume flows with loose bed allowing only net entrainment or honeycombed bed allowing only net deposition.

关 键 词：河流泥沙工程学 垂向二维泥沙 Youngs—VOF k-ε模型 自由面 ELVIRA 

分 类 号：TV139.2[水利工程—水力学及河流动力学] X143[环境科学与工程—环境科学]