中文摘要：

该文采用RANS方程和RNGk-ε、k-ω以及RSM三种湍流模型进行计算,模拟了床面上直立圆柱周围的三维复杂流场,分析了定床条件下光滑床面和粗糙床面条件下流场的形态,并将计算结果与实验进行了对比。结果表明,这三种模型均能模拟出圆柱周围的流场,但是在结果上有一定的差别。要使k-ω模型较好地模拟床面的剪应力,需要比其它两个模型更密的计算网格。与RNGk-ε、k-ω模型相比,RSM模型能够更好地模拟圆柱附近的速度场和床面的剪应力,但是计算时间往往更长。

英文摘要：

The flow fields around a bottom-mounted circular cylinder on rigid beds were simulated by solving the Reynolds-averaged Navier-Stokes equations with three different turbulence models. Numerical results were compared with several sets of experimental data. All of three turbulence models can reproduce flow field well, but some differences also exist. It needs more meshes for using k-ω model to simulate the bed shear stress well although it can resolve the boundary layer directly. Compared with RNGk-ε and k-ω ...