LARGE-EDDY SIMULATION OF THREE-DIMENSIONAL TURBULENT FLOW AROUND A CIRCULAR PIER  

作　　者：Huhe Aode 

机构地区：[1]Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China

出　　处：《Journal of Hydrodynamics》2006年第6期765-772,共8页水动力学研究与进展B辑（英文版）

摘　　要：ABSTRACT： In this article, the turbulent flow field and the scouring mechanism around a circular pier were numerically investigated using the Large Eddy Simulation （LES） method for three scouring holes. The effects of the bottom topographies on the flow structure were studied in detail. The results show that at the downstream of the pier, as the scouring depth increases, the bed shear stress decreases and approaches to the undisturbed shear stress, however, the turbulent intensity, the fluctuating pressure, and the vertical pressure gradient increase gradually.ABSTRACT： In this article, the turbulent flow field and the scouring mechanism around a circular pier were numerically investigated using the Large Eddy Simulation （LES） method for three scouring holes. The effects of the bottom topographies on the flow structure were studied in detail. The results show that at the downstream of the pier, as the scouring depth increases, the bed shear stress decreases and approaches to the undisturbed shear stress, however, the turbulent intensity, the fluctuating pressure, and the vertical pressure gradient increase gradually.

关 键 词：scouring mechanism Large Eddy Simulation （LES） bed shear stress fluctuating pressure turbulent intensity 

分 类 号：TV135[水利工程—水力学及河流动力学]