基于FLUENT的小尺度粗糙明渠紊流数值模拟

采用计算流体动力学软件FLUENT 对一小尺度粗糙明渠紊流进行数值模拟研究,得到了不同水深的垂向流速分布、壁面切应力以及摩阻流速值,并将数值计算结果与物理模型实验结果作了比较,发现两者符合得较好,从而验证了FLUENT 用于计算小尺度粗糙明渠紊流的有效性.由于计算机性能的限制,无法得到粘性底层和过渡层的"真实"流速分布,有待今后进一步研究.

Numerical simulation research of turbulent flows based on software FLUENT in open channel with small scale

The turbulent flows in open channel with small scale is simulated by the computational fluid dynamics software FLUENT and the numerical results of the vertical velocity distributions,the boundary shear stress as well as the friction velocity at different depth are obtained.The numerical computation results are compared with the results of physical model,it is found that both the results are well accorded,demonstrating that the effectiveness of software FLUENT used in computation of turbulent flows in open channel with small scale.Due to the limiting of computer,the "real" flow velocity distribution of viscous boundary layer and transition layer can not be obtained,this issue needs further study in future.