Numerical simulation of droplet impact and evaporation on a porous surface

被引：19
|
作者：
Choi, Moonhyeok [1 ]
Son, Gihun [1 ]
Shim, Woosup [2 ]
机构：
[1] Sogang Univ, Dept Mech Engn, 35 Baekbeom Ro, Seoul 04107, South Korea
[2] Agcy Def Dev, Daejeon, South Korea
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2017年 / 80卷
基金：
新加坡国家研究基金会;
关键词：
Capillary pressure; Droplet impact; Evaporation; Level-set method; Porous surface; LEVEL-SET METHOD; LIQUID DROPLETS; SESSILE DROPLET; HEAT-TRANSFER; MODEL; FLOW; MEDIA; IMPINGEMENT; DOMAINS; MOTION;
D O I：
10.1016/j.icheatmasstransfer.2016.11.002
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Numerical simulation is performed for the evaporation of a droplet impacted on a porous surface. A level set formulation for tracking the droplet deformation is extended to include the effects of evaporation coupled to heat and mass transfer, porosity and porous drag and capillary forces. The local volume averaged conservation equations of mass, momentum, energy and vapor fraction for the porous region are simultaneously solved with the conservation equations for the external fluid region. The computations demonstrate not only the evolution of the liquid-gas interface during the whole period of droplet penetration and evaporation in a porous medium, but also the associated flow, temperature and vapor fraction fields. The effects of impact velocity, porosity and particle size on the droplet deformation and evaporation are quantified. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：18 / 29
页数：12
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