Abstract

Statistical dispersion of flapping events in air-assisted atomization

Highlights

  • Air-assisted atomization is a common process used to induce fragmentation of liquid bulks

  • The main focus of this work is on droplet generation and statistics, which are tightly related to flapping events

  • We examined the droplets generated during each flapping event and computed the standard deviation on each bin of the Probability Density Function (PDF) of the total droplet size

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Summary

Introduction

Air-assisted atomization is a common process used to induce fragmentation of liquid bulks. Among the main unknowns in air-assisted atomizers, the most relevant in applications (e.g. combustion studies, ocean spray estimation ) is the resulting droplets-size-distribution Probability Density Function (PDF). In planar air-assisted atomization, the droplets are mostly generated by wave breaking events, which are generally referred to as "flapping". These events can generate a poly-dispersed droplet distribution, and further breakup can occur as droplets interact with turbulence in the gaseous phase. Being this flow chaotic in nature, flapping events can be very different and the PDF resulting from each flapping event can be substantially altered by the local conditions.

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