Numerical investigation of acoustic vaporization threshold of microdroplets

被引：21
|
作者：
Park, Sukwon [1 ]
Son, Gihun [1 ]
机构：
[1] Sogang Univ, Dept Mech Engn, 35 Baekbeom Ro, Seoul 04107, South Korea
来源：
ULTRASONICS SONOCHEMISTRY | 2021年 / 71卷
基金：
新加坡国家研究基金会;
关键词：
Acoustic; Bubble collapse; Bubble rebound; Droplet vaporization; Threshold; DROPLET VAPORIZATION; PERFLUOROCARBON DROPLETS; ULTRASOUND; NANOPARTICLES; FREQUENCY; DYNAMICS; MODEL; GAS;
D O I：
10.1016/j.ultsonch.2020.105361
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
A numerical model is presented for the acoustic vaporization threshold of a dodecafluompentane (or perfluompentane) microdroplet. The model is based on the Rayleigh-Plesset equation and is improved by properly treating the supercritical state that occurs when a bubble collapses rapidly and by employing the van der Waals equation of state to consider the supercritical state. The present computations demonstrate that the microdroplet vaporization behavior depends intricately on bubble compressibility, liquid inertia and phase-change heat transfer under acoustic excitation conditions. We present acoustic pressure-frequency diagrams for bubble growth regimes and the ADV threshold conditions. The effects of acoustic parameters, fluid properties and the droplet radius on the ADV threshold are investigated.
引用
收藏
页数：10
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