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中文摘要：
采用三维紊流模型对实验室丁坝绕流进行了数值模拟，利用标准k-ε模型将大系数法与壁函数相结合处理丁坝边界．模拟结果表明，模型能有效地处理丁坝边界，较好地模拟了坝头分离流、丁坝后回流及回流区横断面上的二次流，计算值与实测值吻合较好．
英文摘要：
Numerical modeling is an important tool applied to study local flow field with a spur dike. The flow field around the spur dike is simulated with a 3-D numerical model in this study. The standard k-ε model is used. The wall function and large coefficient method are applied to treat the boundary of the spur dike. The flow field around the spur dike in laboratory is simulated. The simulated results demonstrate that the boundary of the spur dike can be treated efficiently, and the model can successfully simulate the separate structure of flow at the top of the spur dike, the circumfluence behind the spur dike and the secondary flow in the cross section in the circumfluence area. The computed results agree well with the experimental data.
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