Numerical simulation of turbulent flow in helically coiled open-channels with compound cross-sections

作     者：SHAO Xuejun WANG Hong CHEN Zhi 

作者机构：Department of Hydraulic Engineering Tsinghua University Beijing 100084 China Department of Hydraulic Engineering Tsinghua University Beijing 100084 China Department of Hydraulic Engineering Tsinghua University Beijing 100084 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2004年第47卷第1期

页      面：97-111页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 50179015  59879009  50221903) 

主　　题：curved open-channel turbulent flow, compound cross-section, orthogonal curvilinear coordinate system. 

摘      要：Turbulence structure in a helically coiled open channel flow is numerically simulated using three different turbulence models--the Launder and Ying model, the Naot and Rodi model, and the nonlinear k-ε Model (SY model). Simulation results were compared with observation of (i) turbulent flows in alternating point-bar type channel bends with rectangular sections, and (ii) straight open channel flows with compound cross-sections. Based on calculations of the impact of various channel curvatures on turbulence characteristics, accuracy of the three turbulence models was analyzed with observed data as a qualitative reference. It has been found out that the Launder and Ying model and the nonlinear k-ε Model are able to predict the same general trend as measured data, and the simulation of the effect of the centrifugal force on the formation of secondary currents produces a correct pattern.