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Three-Dimensional Numerical Simulation on Marangoni Convection in a Sessile Water Droplet Evaporating in its Vapor at Low Pressure
Zhang Y1; Li YR1; Yu JJ1; Liu QS(刘秋生)2
Corresponding AuthorLi, You-Rong(liyourong@cqu.edu.cn)
Source PublicationMICROGRAVITY SCIENCE AND TECHNOLOGY
2019-04-01
Volume31Issue:2Pages:231-240
ISSN0938-0108
AbstractIn 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.
KeywordSessile droplet Evaporation Marangoni convection Kinetic model Numerical simulation
DOI10.1007/s12217-019-9694-1
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000466748700010
WOS KeywordLIQUID DROPLETS ; RESPONSE-SURFACE ; PATTERNS ; FLOW ; EXPRESSIONS ; SUBSTRATE
WOS Research AreaEngineering ; Thermodynamics ; Mechanics
WOS SubjectEngineering, Aerospace ; Thermodynamics ; Mechanics
Funding ProjectNational Natural Science Foundation of China[11532015] ; Chongqing University Postgraduates Innovation Project[CYS18041] ; Fundamental Research Funds for the Central Universities[2018CDXYDL0001]
Funding OrganizationNational Natural Science Foundation of China ; Chongqing University Postgraduates Innovation Project ; Fundamental Research Funds for the Central Universities
Classification二类
Ranking4
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79164
Collection国家微重力实验室
Affiliation1.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
Recommended Citation
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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