Linking nonisothermal interfacial temperature and flow field measurements at an evaporating droplet

International Journal of Heat and Mass Transfer（2022）

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摘要

•Deformed Bénard-Marangoni cells are observed in the evaporating ethanol droplet.•Thermocapillary instability has two transitions at 46 ∘C and 22 ∘C on contact angle.•Unsteady thermocapillary flow is illustrated by PIV and thermographic techniques.•Deformed Bénard-Marangoni cells decrease at about 1.5/degree in the second stage.

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关键词

Sessile droplet evaporating,Thermal patterns,Deformed Bénard-Marangoni cells,Particle image velocimetry measurement

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