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Atomization and Sprays

Published 12 issues per year

ISSN Print: 1044-5110

ISSN Online: 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

PARTICLE AND DROPLET CLUSTERING IN OSCILLATORY VORTICAL FLOWS

Volume 27, Issue 7, 2017, pp. 629-643
DOI: 10.1615/AtomizSpr.2017019152
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ABSTRACT

A new mathematical analysis of particle and droplet clustering in a fluctuating vortex flow is presented. Two-dimensional particle and droplet dynamics equations are solved numerically and analytically, assuming an oscillating vortex flow field. Droplet grouping was found to occur in the vicinity of an oscillating vortex and new streak-like grouping patterns of droplets in a vortex are disclosed. The combination of circumferential and radial fluctuations produces the most significant effects on the droplet grouping, facilitating the construction and destruction of the streak patterns, depending on the chosen flow field and droplet properties. A new analytical formulation is derived using perturbation analyses to model the swirl fluctuations on the spray, providing a simple method to evaluate the effect of droplet dispersion and droplet clustering under fluctuating vortex flows. This approach was found to be in good agreement with the numerical results in cases of low Stokes numbers for both evaporating and nonevaporating droplets. It is shown that evaporation tends to increase the droplet fluctuation amplitude with time and therefore intensifies the grouping effect. The combination of oscillation and evaporation was found to have the most significant effect on droplet grouping, where the amplitude of the proximity curve rapidly increases in a nonlinear manner. Despite the simplicity of the current model its predictions provide insight into the driving mechanisms behind the much more complex turbulent spray-combustion regime, in which similar droplet grouping patterns occur.

CITED BY
  1. Dagan Y., Katoshevski D., Greenberg J. B., Similarity solutions for the evolution of unsteady spray diffusion flames in vortex flows, Combustion Science and Technology, 190, 6, 2018. Crossref

  2. Halfi Eran, Brenner Asher, Katoshevski David, Effect of container geometry on colloids removal from water in oscillation-based flocculation, Water Supply, 20, 1, 2020. Crossref

  3. Halfi Eran, Arad Alumah, Brenner Asher, Katoshevski David, Development of an oscillation-based technology for the removal of colloidal particles from water: CFD modeling and experiments, Engineering Applications of Computational Fluid Mechanics, 14, 1, 2020. Crossref

  4. Avni Orr, Dagan Yuval, Dynamics of evaporating respiratory droplets in the vicinity of vortex dipoles, International Journal of Multiphase Flow, 148, 2022. Crossref

  5. Avni Orr, Dagan Yuval, Dispersion of free-falling saliva droplets by two-dimensional vortical flows, Theoretical and Computational Fluid Dynamics, 36, 6, 2022. Crossref

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