On the Breakup of Water Drops in Air.

Published on May 1, 1971in Journal of the Atmospheric Sciences3.184
路 DOI :10.1175/1520-0469(1971)028<0646:OTBOWD>2.0.CO;2
James D. Klett20
Estimated H-index: 20
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Abstract
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Breakup of drop/bubble can be viewed as a result of fundamental force balance when the disruptive force is greater than the restorative force. A disruptive force acting on the drop/bubble tries to deform it, whereas a restorative force refrains it from deforming. Studying breakup and coalescence phenomenon is utmost important since it governs the amount of interfacial area and hence the exchange of heat, mass and momentum across the interface. It also helps in the development of better closure r...
-New equations and techniques for dealing with drop breakups are developed and applied to the modelling of the evolution of raindrop spectra in rainshafts. Breakup experiments by MCTAGGARTCOWAN and LlST (1975) served as data base. No matter what the original size distribution, the spectrum evolution will always lead to a MarshallPalmer type equilibrium distribution N = No e -^z~, with A = constant and N o proportional to the rainfall rate R. (D stands for raindrop diameter.) For R ~> 29 mm h1 an...
#1Shun-ichiro Karato (UMN: University of Minnesota)H-Index: 83
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Current models of planetary formation suggest a hierarchy in the size of planetesimals from which planets were formed, causing formation of a hot magma ocean through which metal-silicate separation (core formation) may have occurred. We analyze chemical equilibrium during metal-silicate separation and show that the size of iron as well as the thermodynamic conditions of equilibrium plays a key role in determining the chemistry of the mantle (silicates) and core (iron) after core formation. A flu...
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#1J. Kitscha (UWM: University of Wisconsin鈥揗ilwaukee)H-Index: 1
#2G. Kocamustafaogullari (UWM: University of Wisconsin鈥揗ilwaukee)H-Index: 3
Abstract A simple mechanistic model is developed based on the combination of Kelvin-Helmholtz and Rayleigh-Taylor instability theory to describe the breakup of freely rising or falling fluid particles, i.e. bubbles and drops. The breakup is predicted to occur if the growth rate of interfacial waves on the leading front is faster than the rate at which waves propagate around the interface to the side of the particle. Based on this theoretical model and available experimental data, simple correlat...
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Using the stochastic collection equation we find that the time scale for rain out of liquid iron in a Saturn mass protoplanet is rapid compared with other evolutionary time scales and hence iron protoplanetary core formation is inevitable. The survival of this core during subsequent protoplanetary evolution and the consequences of the rain-out on the evolution are also discussed.
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#1J. R. Gillespie (U of T: University of Toronto)H-Index: 2
#2Roland List (U of T: University of Toronto)H-Index: 25
New equations and techniques for dealing with drop breakups are developed and applied to the modelling of the evolution of raindrop spectra in rainshafts. Breakup experiments byMcTaggart-Cowan andList (1975) served as data base.
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#1John R. Grace (McGill University)H-Index: 89
#2T. Wairegi (McGill University)H-Index: 1
Last. J. Brophy (McGill University)H-Index: 1
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A simple empirical model is developed based on two-dimensional linearized Rayleigh-Taylor stability theory to describe the break-up of drops and bubbles in stagnant fluids. Splitting is predicted to occur if the growth of indentations on the leading edge is rapid enough relative to the rate at which the disturbance is carried around the interface to the equator. Experimental data on maximum stable sizes of drops and bubbles in viscous liquids are presented for eighteen different systems, coverin...
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