Convective rolls and hydrothermal waves in evaporating sessile drops

Recent experiments on the evaporation of sessile droplets have revealed the spontaneous formation of various patterns including the presence of hydrothermal waves. These waves had previously been observed, in the absence of evaporation, in thin liquid layers subjected to an imposed, uniform temperat...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 28(2012), 31 vom: 07. Aug., Seite 11433-9
1. Verfasser: Karapetsas, George (VerfasserIn)
Weitere Verfasser: Matar, Omar K, Valluri, Prashant, Sefiane, Khellil
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Fluorocarbons fluorocarbon 72 Water 059QF0KO0R Osmium Tetroxide P40W033BGM Methanol Y4S76JWI15 mehr... Silicon Z4152N8IUI
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520 |a Recent experiments on the evaporation of sessile droplets have revealed the spontaneous formation of various patterns including the presence of hydrothermal waves. These waves had previously been observed, in the absence of evaporation, in thin liquid layers subjected to an imposed, uniform temperature gradient. This is in contrast to the evaporating droplet case wherein these gradients arise naturally due to evaporation and are spatially and temporally varying. In the present paper, we present a theory of evaporating sessile droplets deposited on a heated surface and propose a candidate mechanism for the observed pattern formation using a linear stability analysis in the quasi-steady-state approximation. A qualitative agreement with experimental trends is observed 
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700 1 |a Matar, Omar K  |e verfasserin  |4 aut 
700 1 |a Valluri, Prashant  |e verfasserin  |4 aut 
700 1 |a Sefiane, Khellil  |e verfasserin  |4 aut 
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