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Stability of the interface in co-extrusion flow of two viscoelastic fluids through a pipe

Published online by Cambridge University Press:  26 April 2006

Kang Ping Chen  and
Yi Zhang
Kang Ping Chen
Affiliation:
Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287–6106, USA
Yi Zhang
Affiliation:
Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287–6106, USA
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Abstract

The linear stability of co-extrusion flow of two upper convected Maxwell fluids through a pipe at low Reynolds numbers is studied for arbitrary wavelength disturbances. The fluids interface can become unstable due to various mechanisms. It is shown that elasticity of the fluids can stabilize the capillary instability and a linearly stable interface can be achieved by appropriate choice of controlling parameters.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 247 , February 1993 , pp. 489 - 502
Copyright
© 1993 Cambridge University Press

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