Abstract
Suppressing Breakups in Binary Droplet Collisions by Surfactant
Highlights
Droplet collisions in a gaseous medium are ubiquitous in various natural and practical processes, such as raindrop formation [1,2], spray combustion in liquid-fueled engines [3,4], and the operation of nuclear reactors [5,6]
When surfactant concentration increases to 0.25 wt.%, as shown in Fig. 2(b), Wec further increases, significantly delaying the occurrence of the reflexive separation (IV)
The sliding plate model proposed by Jiang et al [9] to predict the transition boundary from coalescence to stretching separation in binary droplet collision has been re-derived as the following form: B
Summary
Droplet collisions in a gaseous medium are ubiquitous in various natural and practical processes, such as raindrop formation [1,2], spray combustion in liquid-fueled engines [3,4], and the operation of nuclear reactors [5,6]. Regarding the influence of liquid properties, physical models based on momentum theory or energy conservation were proposed to describe the transition boundaries between coalescence and separation regimes [7,8,9,14,15,16,17,18,19,20]. Jiang et al [9] proposed a sliding plate model based on the momentum theory to predict the transition from coalescence (III) to stretching separation (V). This boundary was expressed in a dimensionless form as
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