Topic
Marangoni effect
About: Marangoni effect is a research topic. Over the lifetime, 5336 publications have been published within this topic receiving 98562 citations. The topic is also known as: Gibbs–Marangoni effect.
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TL;DR: Three distinct flow regimes have been revealed in the evaporation of a water-based binary mixture droplet suspended with alumina nanoparticles, and the relative weightings of Regimes I and II determine the motion of the nanoparticles and the formation of the final drying pattern.
Abstract: The flow regimes and the deposition pattern have been investigated by changing the ethanol concentration in a water-based binary mixture droplet suspended with alumina nanoparticles. To visualize the flow patterns, Particle Image Velocimetry (PIV) has been applied in the binary liquid droplet containing the fluorescent microspheres. Three distinct flow regimes have been revealed in the evaporation. In Regime I, the vortices and chaotic flows are found to carry the particles to the liquid-vapor interface and to promote the formation of particle aggregation. The aggregates move inwards in Regime II as induced by the Marangoni flow along the droplet free surface. Regime III is dominated by the drying of the left water and the capillary flow driving particles radially outward is observed. The relative weightings of Regimes I and II, which are enhanced with an increasing load of ethanol, determine the motion of the nanoparticles and the formation of the final drying pattern.
52 citations
TL;DR: In this article, the authors show that the initial rate of spreading is not influenced by the forces at the contact line or at the solid-solution interface, leading to the conclusion that the major driving force for spreading of trisiloxane surfactant solution on hydrophobic surfaces is the surface tension gradient over the air surface.
52 citations
TL;DR: In this article, a comprehensive review of theoretical and experimental studies of several configurations involving liquid-gas interfaces in contact with heated solid substrates which can be either dry or covered with micro- or nanoscale films is provided.
52 citations
TL;DR: In this paper, the stability of a two-layer return thermocapillary flow in the presence of an inclined temperature gradient is investigated, and it is found that a rather weak deviation of the mean temperature gradient from the vertical direction suppresses Pearson's instability mechanism and leads to the appearance of oblique hydrothermal waves.
Abstract: The stability of a two-layer return thermocapillary flow in the presence of an inclined temperature gradient is investigated. Both a linear stability analysis and nonlinear simulations have been performed for an air–water system. It is found that a rather weak deviation of the mean temperature gradient from the vertical direction suppresses Pearson's instability mechanism and leads to the appearance of oblique hydrothermal waves. In a certain region of parameters, transverse convective rolls drifting with the mean flow appear.
52 citations
TL;DR: In this paper, the theoretically predicted stability of various binary liquid-liquid interfaces in the presence of a transferring surfactant is examined and compared against experimental observations, and it is found that the accuracy of some of the current stability criteria in predicting interfacial stability under such conditions is poor.
52 citations