
Registro 27 de 40 en EI COMPENDEX (19951996)
TI: Force fields on inviscid, slender, annular liquid jets
AU: RamosJI
SO: InternationalJournalforNumericalMethodsinFluids.
v 23 n 3 Aug 15 1996, p 221239.
IS: 02712091
AB: Regular perturbation expansions are used to analyse the fluid dynamics
of unsteady, inviscid, slender, thin, incompressible (constant density),
axisymmetric, upward and downward, annular liquid jets subjected to nonhomogeneous,
conservative body forces when both the annular jets are very thin and the
gases enclosed by and surrounding the jet are dynamically passive. Both
inertia and capillaritydominated annular jets are considered. It is shown
that, for inertiadominated jets, closure of the leadingorder equations
is achieved at second order in the perturbation parameter, which is the
slenderness ratio, whereas closure is achieved at first order for capillaritydominated
jets. The steady leadingorder equations are solved numerically by means
of both an adaptive finite difference method which maps the curvilinear
geometry of the jet onto a unit square and a fourthorderaccurate RungeKutta
technique. It is shown that the fluid dynamics of steady, annular liquid
jets is very sensitive to the Froude and Weber numbers and nozzle exit
angle in the presence of nonhomogeneous, conservative body forces. For
upward jets with inwardly or axially directed velocities at the nozzle
exit the effect of the nonhomogeneous, conservative body forces is to
increase the leadingorder axial velocity component, decrease the jet's
mean radius and move the stagnation point downstream. For downward jets
with radially outward velocity at the nozzle exit the axial velocity component
decreases monotonically as the magnitude of the nonhomogeneous, conservative
body forces is increased. (Author abstract) 7 Refs.
PY: 1996
LA: English
AN: EIX96433304016
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