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Solitary vortex pairs in viscoelastic couette flow

Physical Review Letters, ISSN: 1079-7114, Vol: 78, Issue: 8, Page: 1460-1463
1997
  • 83
    Citations
  • 0
    Usage
  • 26
    Captures
  • 5
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    83
    • Citation Indexes
      83
  • Captures
    26
  • Mentions
    5
    • References
      5
      • Wikipedia
        5

Article Description

We report experimental observation of a localized structure, which is of a new type for dissipative systems. It appears as a solitary vortex pair (“diwhirl”) in Couette flow with highly elastic polymer solutions. In contrast to the usual solitons the diwhirls are stationary. It is also a new object in fluid dynamics—a pair of vortices that build a single entity. The diwhirls arise as a result of a purely elastic instability through a hysteretic transition at negligible Reynolds numbers. It is suggested that the vortex flow is driven by the same forces that cause the Weissenberg effect. © 1997 American Physical Society.

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