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Atomization and Sprays
IF: 1.189 5-Year IF: 1.596 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v3.i1.50
pages 91-107

AXISYMMETRIC CALCULATIONS OF THREE-DROPLET INTERACTIONS

C. H. Chiang
Department of Mechanical and Aerospace Engineering, University of California, Irvine, California 92664
William A. Sirignano
Department of Mechanical and Aerospace Engineering, University of California at Irvine, USA

ABSTRACT

The present study extends the previous droplet models [1,2] to investigate numerically the system of three droplets that are moving in tandem with respect to the free flow. The purposes of this study are to study the wake effect of the lead droplet on the downstream droplets and to examine the effects of initial spacing on the total system. The effects of variable thermophysical properties, transient heating and internal circulation of liquid, deceleration of the flow due to the drag of the droplet, boundary-layer blowing, and moving interface due to surface regression, as well as relative droplet motion, are included. The results are compared with those of an isolated droplet [1] as well as those of the two-droplet system [2] to investigate the effect of the presence of the third droplet. The interaction effects from the downstream or upstream droplet are identified. The transport rates of droplets are reduced from the values for an isolated droplet, and values for the downstream droplets are profoundly less Лап those for the lead droplet. The difference in transport rates is large between the first two droplets; however, it becomes insignificant between the second and the third droplets. The modifications to the transfer correlations for an isolated droplet needed to account for the interaction effects are determined.