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Chinese Physics, 2005, Vol. 14(7): 1392-1397    DOI: 10.1088/1009-1963/14/7/022
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

Development and evolution of flow over three-dimensional cylinder

Wang Gang (王刚), Liang Xin-Gang (梁新刚)
School of Aerospace, Tsinghua University, Beijing 100084,China
Abstract  By solving the three-dimensional (3D) time-dependent compressible laminar Navier--Stokes equations with a finite-volume method incorporating the third-order-accuracy discretization scheme, the flow structure around a 3D cylinder is investigated and its evolution mechanism is presented in this paper. At high incidence angles, a shed vortex series forms at leeside of the 3D cylinder with its sectional flow pattern very similar to the Karman vortex street developed behind a two-dimensional cylinder. The main, the secondary and the tertiary vortex system compose a hierarchical structure over the 3D cylinder. Each tertiary vortex develops into a new main vortex after the breakaway of its former main vortex, and merges the secondary vortex on its opposite side of the symmetry plane.
Keywords:  3D cylinder      flow mechanism      vortex merger      quasi-Karman vortex street  
Received:  14 October 2004      Revised:  17 December 2004      Accepted manuscript online: 
PACS:  47.15.-x (Laminar flows)  
  47.32.-y (Vortex dynamics; rotating fluids)  
  47.10.ad (Navier-Stokes equations)  
  47.40.-x (Compressible flows; shock waves)  

Cite this article: 

Wang Gang (王刚), Liang Xin-Gang (梁新刚) Development and evolution of flow over three-dimensional cylinder 2005 Chinese Physics 14 1392

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