In this study, numerical simulations were performed to investigate the flow and turbulence characteristics of rectangular spur dikes with varying permeability using the Reynolds stress turbulence model developed by three-dimensional (3-D) numerical code FLUENT (ANSYS). In this research, both permeable and impermeable spur dikes were investigated with varying permeability (25%, 37%, 49%, 62%, and 74%) to show its effect on the flow structure. At z_h=3.5 cm (where z is the maximum flow depth, and z_h is mid of flow depth), 3-D flow velocities and depth-averaged velocities were measured in the horizontal plane. Different velocity profiles and contours, turbulent intensities (T.I), and turbulent kinetic energy (TKE) were analyzed at various selected positions. The findings indicate that an increase in the permeability of the spur dikes up to 74% had a reciprocal effect on the mean stream-wise velocity. Moreover, the recirculation regions created within the impermeable spur dike field decreased with increased permeability of spur dikes. The permeable spur dike head showed a significant decrease in T.I, and TKE compared to the impermeable spur dike. Therefore, to protect the spur dike head from severe turbulent flow during floods and reduce the spur dike field’s recirculation region, a permeable spur dike is preferred.

在这项研究中，使用三维（3-D）数值代码FLUENT（ANSYS）开发的雷诺应力湍流模型，进行了数值模拟，以研究具有不同渗透率的矩形丁坝的流量和湍流特性。在这项研究中，对渗透性和非渗透性丁坝进行了研究，研究了不同渗透率（25％，37％，49％，62％和74％）对流结构的影响。在z _h = 3.5 cm（其中z是最大流动深度，z _h是流动深度的中间）时，在水平面中测量了3-D流速和深度平均速度。不同的速度分布和轮廓，湍流强度（TI）和湍动能（在各种选择的位置分析了TKE。研究结果表明，丁坝的渗透率提高到74％，对平均水流速度产生反作用。此外，随着丁坝渗透性的增加，在不可渗透丁坝区域内形成的回流区域减少。与不渗透丁坝相比，渗透丁坝头的TI和TKE显着降低。因此，为了保护丁坝头不受洪水期间的剧烈湍流影响并减小丁坝场的再循环区域，首选可渗透丁坝。