Particle image velocimetry and proper orthogonal decomposition analysis of the channel flow equipped with cylindrical ribs
作者: Gurlek Cahit
刊名: Thermal Science, 2019, Vol.23 (2 Part A), pp.417-426
来源数据库: Directory of Open Access Journals
DOI: 10.2298/TSCI170305204G
关键词: Channel flowCylindrical ribsProper orthogonal decompositionFlow separationParticle image velocimetry
原始语种摘要: The characteristics of the flow fields in a rectangular channel equipped with cylindrical ribs were examined through the particle image velocimetry experiments. The mean and turbulence characteristics were presented for three different Reynolds numbers of 2900, 8400, and 15000. In addition, the coherent flow structures were extracted by means of the proper orthogonal decomposition method. The flow field is characterized by a large re-circulation region and a secondary clockwise-rotating corner vortex. The high vorticity, fluctuation velocity and shear stress contours are formed along the free shear layers emanating from the upstream rib. As Reynolds numbers increase, the positive vorticity contours extend downstream and fluctuation velocity and shear stress contours spread out towards the...
全文获取路径: DOAJ  (合作)

  • image 
  • decomposition 分解
  • proper 合适的
  • orthogonal 直交的
  • cylindrical 圆柱形的
  • rotating 转动的
  • corner 弯曲软波导
  • Reynolds 雷诺
  • equipped 装备的
  • clockwise 顺时针方向的