Formation and interaction of multiple secondary flow vortical structures in a curved pipe: transient and oscillatory flows
作者: Mohammad Reza NajjariChristopher CoxMichael W. Plesniak
作者单位: 11 Biofluid Dynamics Laboratory , Department of Mechanical and Aerospace Engineering , The George Washington University , 800 22nd Street NW , Washington , DC 20052 , USA
刊名: Journal of Fluid Mechanics, 2019, Vol.876 , pp.481-526
来源数据库: Cambridge University Press Journal
DOI: 10.1017/jfm.2019.510
原始语种摘要: $180^{\circ }$]]> curved pipe are investigated both numerically and experimentally to understand secondary flow vortex formation and interactions. The results of numerical simulations and particle image velocimetry experiments are highly correlated, with a low error. To enable simulations in a smaller domain with shorter inlet section, an analytical solution for the unsteady Navier–Stokes equation is obtained with non-zero initial conditions to provide physical velocity profiles for the simulations. The vorticity transport equation is studied and its terms are balanced to find the mechanism of vorticity transfer to structures in the curved pipe. Several vortices are identified via various vortex identification (ID) methods and their results are compared. Isosurfaces of the ...
全文获取路径: Cambridge U Press  (合作)
影响因子:2.183 (2012)

  • curved 弯的
  • secondary 二次的
  • pipe 
  • equation 方程
  • studied 学习
  • initial 开首字母
  • unsteady 不安定的
  • inlet 峡湾
  • vorticity 涡度
  • solution 溶液