Theoretical Determination of Droplet Diameters and Flow Rates in Sprays and Aerosols

Howard Stone,Maksim Mezhericher

doi:10.2218/iclass.2021.6162

Abstract

Theoretical Determination of Droplet Diameters and Flow Rates in Sprays and Aerosols

Highlights

In our previous articles [1,2] we demonstrated a novel liquid atomization process generating micro-sprays and aerosols of submicron-diameter droplets for pure solvents, suspensions, and solutions with wide ranges of viscosity and surface tension
The research question addressed in this study is development of a theoretical description for calculation of droplet diameters and flow rates produced by the new liquid atomization process for various liquids
The central lines of atomization region on the diagrams were obtained from Eqs. (8) and (14), assuming the proportionality coefficients to be order of unity

Summary

Introduction

In our previous articles [1,2] we demonstrated a novel liquid atomization process generating micro-sprays and aerosols of submicron-diameter droplets for pure solvents, suspensions, and solutions with wide ranges of viscosity and surface tension. The process is based on gas jetting on thin liquid films formed as bubbles on a liquid surface (see Fig. 1a). Using the characteristic timescales of the liquid atomization, including the supplied energy of the gas jet p. L l l and viscous dissipation v l lc l in the liquid, with the approximation lc d for all the phenomena, the dimensionless groups can be expressed as timescale ratios: Lad. The obtained Eq (8) connects between the specific energies provided by the gas jets and dissipated by the atomized liquid in nondimensional form and determines the diameters of the produced droplets. The obtained equation connects the rates of specific energies provided by the gas jets and dissipated by the atomized liquid in nondimensional form, and it determines the flow rates of the produced droplets

Results and Discussion

Lad 1 and

Conclusions