方形截面弯管内的二次流动及其分叉  

Secondary Flow and its Bifurcation in a Curved Pipe of Square Cross-section

作　　者：薛雷[1] 

机构地区：[1]福建工程学院土木工程学院,福建福州350108

出　　处：《厦门理工学院学报》2013年第1期55-59,共5页Journal of Xiamen University of Technology

基　　金：福建省青年科技人才创新项目(2007F3007);福建省教育厅科技项目(JA07145)

摘　　要：基于曲线坐标系内的流动模型及其数学描述,采用Galerkin方法对方形截面弯曲管道内充分发展的稳态不可压层流流动进行数值模拟,分析管道曲率参数κ及流动条件Re数对管内二次流动特性的影响;给出管内二次流动的分叉状态图,并精确地求得出现四涡解的分叉点.Abstract： Based on the N-S equations in a curvilinear coordinate system, the Gaterkm memoa ts useu to simulate the developed steady laminar flow in a curved pipe of square cross-section. The influence of pipe parameter K and Reynold numble Re on the characteristics of the secondary flow in curved pipes is discussed. Then a four-vortices solution is obtained with an accurate bifurcation point shown in the state diagram of the bifurcation solutions of the secondary flow.

关 键 词：弯管 二次流动 分叉 GALERKIN方法 

分 类 号：O35[理学—流体力学] U171[理学—力学]