The dynamics of droplet impact on a heated porous surface

被引：37
作者：
Zhao, P. [1 ]
Hargrave, G. K. [1 ]
Versteeg, H. K. [1 ]
Garner, C. P. [1 ]
Reid, B. A. [1 ]
Long, E. J. [1 ]
Zhao, H. [1 ]
机构：
[1] Loughborough Univ Technol, Wolfson Sch Mech Elect & Mfg Engn, Loughborough LE11 3TU, Leics, England
来源：
CHEMICAL ENGINEERING SCIENCE | 2018年 / 190卷
关键词：
Droplet impact; Porous surface; Impact regime; Maximum spreading; SOLID-SURFACE; LIQUID-DROP; LEIDENFROST TEMPERATURE; NUMERICAL SIMULATIONS; WATER DROPLET; SOLIDIFICATION; FILM; DEFORMATION; IMPINGEMENT; ABSORPTION;
D O I：
10.1016/j.ces.2018.06.030
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this paper, droplet impact on a porous surface is experimentally investigated over a wide range of Weber numbers and surface temperatures. Regime transition criteria have been deduced to determine droplet post-impingement behaviour as a function of the Weber number and surface temperature for which a droplet impacting on a porous surface. Based on the energy balance, an analytical model with improved boundary layer description is proposed to predict maximum spreading of droplet following impact on porous surfaces when the effect of heat transfer is negligible. The results of the model indicate that the spreading process after droplet impact on porous surfaces is governed by the viscous dissipation and matric potential. The maximum-spread model predictions agreed well with experimental measurements reported in this paper and the literature over a large range of Weber numbers and different porous surfaces. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：232 / 247
页数：16
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