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Evolution of thermal patterns during steady state evaporation of sessile droplets
Ye S; Wu CM; Zhang L; Li YR; Liu QS(刘秋生)
2018-11-01
发表期刊EXPERIMENTAL THERMAL AND FLUID SCIENCE
卷号98页码:712-718
ISSN0894-1777
摘要The steady state evaporation process of sessile isopropanol droplets was experimentally investigated by utilizing the infrared thermography. The steady state was achieved by replenishing the droplet from its base. Results indicate that once the evaporation is initiated, the interfacial temperature closed to the triple line is higher than that at the apex, which induces a thermocapillary flow along the interface from the contact line to the apex. With the increase of the evaporation rate, the temperature gradient is enlarged; the flow is enhanced and loses its stability. Then, several thermal patterns, including the forked pattern, the curved hydrothermal waves, the rosebud pattern and the petal-like pattern, were observed. The evolution of thermal pattern is highly correlated with the droplet height and the thermal wave number increases with the substrate temperature. Meanwhile, the global evaporation rate is higher and the surface flow is more intense on copper substrate than that on aluminum substrate.
关键词Steady state evaporation Sessile droplet Thermocapillary flow Thermal patterns Infrared thermography
DOI10.1016/j.expthermflusci.2018.07.016
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000441855300062
关键词[WOS]HYDROTHERMAL WAVES ; DROPS ; INSTABILITIES ; SURFACES ; FLOW
WOS研究方向Thermodynamics ; Engineering, Mechanical ; Physics, Fluids & Plasmas
WOS类目Thermodynamics ; Engineering ; Physics
项目资助者National Natural Science Foundation of China [11532015] ; Fundamental Research Funds for the Central Universities [2018CDXYDL0001]
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力学所作者排名4
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77934
专题国家微重力实验室
作者单位1.[Ye, Shuang
2.Wu, Chun-Mei
3.Zhang, Li
4.Chongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Coll Power Engn, Chongqing 400044, Peoples R China
5.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China
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Ye S,Wu CM,Zhang L,et al. Evolution of thermal patterns during steady state evaporation of sessile droplets[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE,2018,98:712-718.
APA Ye S,Wu CM,Zhang L,Li YR,&刘秋生.(2018).Evolution of thermal patterns during steady state evaporation of sessile droplets.EXPERIMENTAL THERMAL AND FLUID SCIENCE,98,712-718.
MLA Ye S,et al."Evolution of thermal patterns during steady state evaporation of sessile droplets".EXPERIMENTAL THERMAL AND FLUID SCIENCE 98(2018):712-718.
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