Marangoni convection in binary drops in air cooled from below

Ganzevles, Fla Frank; Geld, van der Cwm Cees

doi:10.1016/s0017-9310(97)00153-1

Cited by 20 publications

(5 citation statements)

References 14 publications

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“…The thermocapillary convection appears as microconvective movements, in which a temperature gradient through the interface provokes tangential movements of fluid in the same direction of temperature gradients, but not in the same direction of surface tension gradients generated [8,9]. Usually, the fluid has the tendency to move from the higher temperature and lower surface tension region toward the lower temperature and higher surface tension region.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on Marangoni effect induced by heat and mass transfer

D'Aubeterre¹,

Silva²,

Aguilera³

2005

International Communications in Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Experimental study on Marangoni effect induced by heat and mass transfer

D'Aubeterre¹,

Silva²,

Aguilera³

2005

International Communications in Heat and Mass Transfer

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“…In Savino and Fico (2004), drops are attached to the tip of a capillary tube and heated in a hot air stream. The use of IRT was also demonstrated for the investigation of thermocapillary convection within droplets resting on a heated solid surface (Brutin et al 2010(Brutin et al , 2011Ganzevles and Van Der Geld 1998;Sefiane et al 2008). Infrared thermography can be used to measure the occurrence of temperature gradients on the droplet surface (Ganzevles and Van Der Geld 1998) and also makes it possible to visualize cellular patterns driven by internal convection and spontaneous evaporation (Fig.…”

Section: Infrared Thermometry and Thermal Imaging (Irt)mentioning

confidence: 99%

Temperature and chemical composition of droplets by optical measurement techniques: a state-of-the-art review

2013

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“…O'Hare and Spedding 13 conducted evaporation experiments on ethanol/water multicomponent droplets, revealing that the evaporation rate greatly depended on the vapor pressure driving force. Ganzevles and Van der Geld 14 studied Marangoni convection in multicomponent droplets and found that the duration of Marangoni convection increases with the increase in ethanol concentration when it is less than 10 vol %. Sefiane et al 15 experimentally investigated the evaporation of ethanol/water multicomponent droplets.…”

Section: ■ Introductionmentioning

confidence: 99%

Interfacial Effects of Nanostructured Doubly Reentrant Surfaces on the Evolution of Local Concentration and Fluid Flow in an Evaporating Droplet

Ye,

Yang,

Liao

et al. 2024

Langmuir

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Surface modification, such as bioinspired nanostructured doubly reentrant surfaces that have presented superhydrophobic wettability even under low-surface-tension liquid, is a very promising technology for controlling droplet dynamics, heat transfer, and evaporation. In this article, we investigate the interfacial effects of nanostructured doubly reentrant surfaces on the flow behaviors and local concentration evolution during the evaporation of an ethanol/water multicomponent droplet. Using particle image velocimetry (PIV) and novel aggregate-induced emission-based (AIE) techniques, the flow patterns and local concentration distributions on both hydrophobic and nanostructured doubly reentrant surfaces were probed and compared. It is found that in addition to the established Marangoni flow-dominated stage, transition stage, and buoyancy-induced flow-dominated stage, a new transition stage and a rolling stage for the nanostructured doubly reentrant surface are detected in the late evaporation period. Differences in the local concentration distribution evolution occur depending on the hydrophobicity of the surface on which the droplet is placed. For the hydrophobic surface, a nonuniform local concentration distribution exists consistently, with a high water fraction in a shell-shaped region near the liquid−air interface and a secondary concentration gradient within this shell-shaped region. The concentration distribution on the nanostructured doubly reentrant surface evolves in a more complex manner, with a stripshaped region of high water fraction forming in the intermediate stage and then reorganized by rolling flow in the late stage. Finally, theoretical analysis combining PIV and AIE visualization results reveals that the variations in droplet concentration distributions on surfaces with different hydrophobicities exert a significant impact on evaporative behaviors. These behaviors, in turn, affect the evolution of the local concentration distribution.

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Marangoni convection in binary drops in air cooled from below

Cited by 20 publications

References 14 publications

Experimental study on Marangoni effect induced by heat and mass transfer

Experimental study on Marangoni effect induced by heat and mass transfer

Temperature and chemical composition of droplets by optical measurement techniques: a state-of-the-art review

Interfacial Effects of Nanostructured Doubly Reentrant Surfaces on the Evolution of Local Concentration and Fluid Flow in an Evaporating Droplet

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