Three-Dimensional Stabilization of a Vortex Street in Viscoelastic Liquids

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• 作者：Olivier Cadot ; Satish Kumar
• 刊名：Lecture Notes in Physics
• 出版年：2000
• 出版时间：2000
• 年：2000
• 卷：555
• 期：1
• 页码：p.135
• 全文大小：200 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Mathematical Methods in Physics
  Mathematical and Computational Physics
  Astronomy, Astrophysics and Cosmology
  Atoms, Molecules, Clusters and Plasmas
  Relativity and Cosmology
  Extraterrestrial Physics and Space Sciences
  Condensed Matter
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1616-6361

文摘

The local injection of a viscoelastic liquid into the vortex street produced by a circular cylinder drastically modifies its two- and three-dimensional structure. At low injection rates, a stabilization of mode A (3D instability) is observed while the primary wavelength of the vortex street (2D instability) remains identical to that of the Newtonian case. There is also a flattening of the vortices in the street. At higher injection rates, the primary wavelength increases as well. These observations support the stabilization mechanism suggested by the numerical simulations of Kumar and Homsy (S. Kumar and G. M. Homsy: J. Non-Newtonian Fluid Mech. 83, 251 (1999)).