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Atomization and Sprays

Publication de 12  numéros par an

ISSN Imprimer: 1044-5110

ISSN En ligne: 1936-2684

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00095 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

A MODEL OF AN ATOMIZING DROP

Volume 24, Numéro 11, 2014, pp. 977-997
DOI: 10.1615/AtomizSpr.2014010719
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RÉSUMÉ

This paper presents a two-level mathematical model that describes the aerodynamics of an evaporating mist around an atomizing spherical drop in a uniform air stream at large Weber numbers. The lower-level model describes the mechanics of daughter droplet formation at the parent drop surface. The model utilizes the concept of quasi-continuous, high-frequency periodic dispersion from the unstable part of the drop surface caused by the hydrodynamic instability of the gradient flow in conjugated boundary layers. The upper-level model reflects spatial aerodynamics of the evaporating spray being generated by atomizing drop. In this model, daughter droplets are assumed to behave as a multivelocity continuum and the ballistics of an axisymmetric evaporating mist are rendered as equations in dynamic four-dimensional space. The model rests on the following assumptions: the air-velocity field around a spherical drop is potential; the daughter droplets and their associated vapor do not influence the air flowfield; the initial velocity of newborn droplet is equal to that of the fastest unstable wave on the parent drop surface that produces it; the Ranz-Marshall model is appropriate for describing droplet evaporation. The variance in time of the spatial distributions of the breakaway droplets' mass, number density, and of the vapor density is processed and analyzed in video format. The detailed fields of the droplets' mean diameters are also obtained. Large vapor concentrations and a decreasing local gas-phase temperature are revealed.

CITÉ PAR
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