基于RNG紊流模型，采用VOF法、空度法和璧面函数法分别处理自由面、不规则边界和壁边界，对丁坝附近的水流进行了模拟和研究。采用先进的瞬时流场测量仪器——PIV来测量丁坝的局部平面和剖面流场，对建立的模型进行了验证。模型计算结果与水槽试验和他人试验资料吻合较好，表明模型能够模拟多种情况下的丁坝流动规律及自由面变化。

RNG turbulent model combining with VOF method, porosity method and wall function was used to simulate and research the flow around a spurdike. To research and analyze the character of flow around the spur dike in model test subtly, an instrument marked PIV was used in a glass flume test. The computed results and the data obtained by the authors in test and previous authors information were compared, and they agree well. This result shows that the model can simulate the flow and free surface around a spurdike under many conditions.