Electronic Resource
New York, NY
:
American Institute of Physics (AIP)
Physics of Fluids
4 (1992), S. 1915-1928
ISSN:
1089-7666
Source:
AIP Digital Archive
Topics:
Physics
Notes:
In this paper the stability of annular pressure-driven parallel flows of two liquids sandwiching a free cylindrical interface is considered. For small to moderate Reynolds numbers, the interface is susceptible to capillary and interfacial wave instabilities, the latter instability caused by a jump in viscosity at the interface. It is shown that favorable velocity profiles in both liquids may stabilize capillary breakup of the interface and suppress the axisymmetric interfacial wave instability. A long-wave analysis leads to the physical mechanism responsible for stabilization of capillary breakup. This physical mechanism is a generalization of that by which capillary breakup is stabilized by interfacial shear in an annular film of a single liquid. Stabilization of intermediate wavelengths is studied with a mechanical energy analysis, which leads to a description of the energetic processes at work.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.858514
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