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Experimental investigation of evaporation dynamic of sessile droplets in pure vapor environment with low pressures
Ye S1; Zhang L2; Wu CM1; Li YR1; Liu QS(刘秋生)3
Corresponding AuthorLi, You-Rong(liyourong@cqu.edu.cn)
Source PublicationINTERNATIONAL JOURNAL OF THERMAL SCIENCES
2020-03-01
Volume149Pages:10
ISSN1290-0729
AbstractIn order to understand the evaporation dynamic of sessile droplet in pure vapor environment, this paper presented a series of experimental observations on the evolution of thermal patterns and the variation of evaporation rate during water and ethanol droplet evaporation at low pressures. The contact radius of droplet is fixed at 2.5 mm and the height varies from 0.4 to 1.6 mm. Results show that the surface temperature distributions for both water and ethanol are uniform at a high pressure ratio. When the pressure is reduced, a ring-like thermal pattern appears on the water droplet surface, while the gear-like pattern and the cellular flow happen on the ethanol droplet surface. Interestingly, the gear-like pattern is static when the substrate temperature is low, while it will oscillate at a high substrate temperature. Meanwhile, the cellular flow is affected by the droplet height. The evaporation is promoted by reducing the pressure. Moreover, due to the decrease of the evaporation surface area and the increase of surface temperature, the evaporation rate decreases first and then increases with the decrease of the droplet height.
KeywordSessile droplet Evaporation Pure vapor Low pressure Experiment
DOI10.1016/j.ijthermalsci.2019.106213
Indexed BySCI ; EI
Language英语
WOS IDWOS:000505769100009
WOS KeywordHYDROTHERMAL WAVES ; THERMAL PATTERNS ; MARANGONI FLOW ; HEAT-TRANSFER ; WATER ; SURFACE ; DROPS ; THERMOGRAPHY
WOS Research AreaThermodynamics ; Engineering
WOS SubjectThermodynamics ; Engineering, Mechanical
Funding ProjectNational Natural Science Foundation of China[11532015] ; National Natural Science Foundation of China[51776022] ; Science and Technology Research Project of Chongqing Education Commission[KJQN201903305]
Funding OrganizationNational Natural Science Foundation of China ; Science and Technology Research Project of Chongqing Education Commission
Classification一类
Ranking5
ContributorLi, You-Rong
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81277
Collection国家微重力实验室
Affiliation1.Chongqing Univ, Coll Power Engn, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China;
2.Chongqing City Management Coll, Chongqing 401331, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Ye S,Zhang L,Wu CM,et al. Experimental investigation of evaporation dynamic of sessile droplets in pure vapor environment with low pressures[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES,2020,149:10.
APA Ye S,Zhang L,Wu CM,Li YR,&刘秋生.(2020).Experimental investigation of evaporation dynamic of sessile droplets in pure vapor environment with low pressures.INTERNATIONAL JOURNAL OF THERMAL SCIENCES,149,10.
MLA Ye S,et al."Experimental investigation of evaporation dynamic of sessile droplets in pure vapor environment with low pressures".INTERNATIONAL JOURNAL OF THERMAL SCIENCES 149(2020):10.
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