Three-Dimensional Numerical Simulation on Marangoni Convection in a Sessile Water Droplet Evaporating in its Vapor at Low Pressure

doi:10.1007/s12217-019-9694-1

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	Three-Dimensional Numerical Simulation on Marangoni Convection in a Sessile Water Droplet Evaporating in its Vapor at Low Pressure
	Zhang Y 1; Li YR 1; Yu JJ 1; Liu QS(刘秋生)2
通讯作者	Li, You-Rong(liyourong@cqu.edu.cn)
发表期刊	MICROGRAVITY SCIENCE AND TECHNOLOGY
	2019-04-01
卷号	31 期号:2 页码:231-240
ISSN	0938-0108
摘要	In order to understand the effect of Marangoni convection on the evaporation rate and the flow pattern, we performed a series of three-dimensional numerical simulations on evaporation process of sessile water droplet by introducing a kinetic model. Substrate temperature and the ratio of vapor pressure varied from 299K to 308K and from 0.92 to 0.99, respectively. The variation range of contact angle was between 9.15 degrees and 120 degrees. Results show that the axisymmetric ring-shape temperature distribution on droplet free surface transforms into a serrated temperature distribution because of the enhancing Marangoni convection with the increase of substrate temperature. In addition, with the decrease of vapor pressure, the total evaporation rate on free surface will be increased and the Marangoni effect will be enhanced. The flow pattern is axisymmetric at 90(o)120(o) when the substrate temperature is fixed. However, it shifts to a multi-cellular pattern with the decrease of contact angle as a result of the competition between Marangoni flow and the evaporation. Additionally, the total evaporation rate increases with the increase of contact angle when contact angle is above 60(o), but when the contact angle is below 60(o), the trend is reverted. The temperature distribution becomes distinct at a small contact angle.
关键词	Sessile droplet Evaporation Marangoni convection Kinetic model Numerical simulation
DOI	10.1007/s12217-019-9694-1
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000466748700010
关键词[WOS]	LIQUID DROPLETS ; RESPONSE-SURFACE ; PATTERNS ; FLOW ; EXPRESSIONS ; SUBSTRATE
WOS研究方向	Engineering ; Thermodynamics ; Mechanics
WOS类目	Engineering, Aerospace ; Thermodynamics ; Mechanics
资助项目	National Natural Science Foundation of China[11532015] ; Chongqing University Postgraduates Innovation Project[CYS18041] ; Fundamental Research Funds for the Central Universities[2018CDXYDL0001]
项目资助者	National Natural Science Foundation of China ; Chongqing University Postgraduates Innovation Project ; Fundamental Research Funds for the Central Universities
论文分区	二类
力学所作者排名	4
RpAuthor	Li, You-Rong
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/79163
专题	微重力重点实验室
作者单位	1.Chongqing Univ, Minist Educ, Sch Energy & Power Engn, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400044, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang Y,Li YR,Yu JJ,et al. Three-Dimensional Numerical Simulation on Marangoni Convection in a Sessile Water Droplet Evaporating in its Vapor at Low Pressure[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2019,31,2,:231-240.
APA	Zhang Y,Li YR,Yu JJ,&刘秋生.(2019).Three-Dimensional Numerical Simulation on Marangoni Convection in a Sessile Water Droplet Evaporating in its Vapor at Low Pressure.MICROGRAVITY SCIENCE AND TECHNOLOGY,31(2),231-240.
MLA	Zhang Y,et al."Three-Dimensional Numerical Simulation on Marangoni Convection in a Sessile Water Droplet Evaporating in its Vapor at Low Pressure".MICROGRAVITY SCIENCE AND TECHNOLOGY 31.2(2019):231-240.

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