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Stability Analysis of a Plane Poiseuille Flow of Multilayered Viscoelastic Fluids: An Energetic Approach

[+] Author Affiliations
François Rousset, Patrick Bourgin, Liviu-Iulian Palade

INSA de Lyon, Oyonnax Cedex, France

Paper No. FEDSM2005-77246, pp. 1055-1059; 5 pages
doi:10.1115/FEDSM2005-77246
From:
  • ASME 2005 Fluids Engineering Division Summer Meeting
  • Volume 1: Symposia, Parts A and B
  • Houston, Texas, USA, June 19–23, 2005
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4198-7 | eISBN: 0-7918-3760-2
  • Copyright © 2005 by ASME

abstract

Coextrusion flows of compatible polymers are known to be generally more stable than the same flows of incompatible systems. It is shown in this paper that the weak response to disturbance of such flows can be predicted by formulating an energetic approach of the problem. The energy dissipated by the interdiffusion process is evaluated which allows stability maps to be obtained for Newtonian and Oldroyd-B fluids. These maps show the increase of the stable domain in the case of compatible polymeric systems for both Newtonian and viscoelastic fluids.

Copyright © 2005 by ASME

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