Abstract
The role of interfacial shear in the onset of instability
of a cylindrical viscous liquid jet
in a viscous gas surrounded by a coaxial circular pipe is elucidated by
use of an energy
budget associated with the disturbance. It is shown that the shear force
at the
liquid–gas interface retards the Rayleigh-mode instability which
leads to the breakup
of the liquid jet into drops of diameter comparable to the jet diameter,
due to capillary
force. On the other hand the interfacial shear and pressure work in concert
to cause the
Taylor-mode instability which leads the jet to break up into droplets of
diameter much
smaller than the jet diameter. While the interfacial pressure plays a slightly
more
important role than the interfacial shear in amplifying the longer-wave
spectrum in the
Taylor mode, the shear stress plays the main role of generating the disturbances
of
shorter wavelength.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
34 articles.
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