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: In this article, the metal mixing process in laser keyhole welding of dissimilar metals is investigated with a combination of experimental and modeling approaches to reveal the effects of laser power, welding speed, and heat input on metal mixing in the fusion zone.
60 citations
TL;DR: The evaporation of sessile multi-component droplets is modeled with an axisymmetic finite element method and results are compared with corresponding results of aubrication theory model, showing that the application of lubrication theory can cause considerable errors.
60 citations
TL;DR: The volume-averaged shear-induced drop-coalescence efficiency epsilonv is measured by in situ videomicroscopy of blends of poly(propylene glycol) and poly(ethylene glycol), emulsified withpoly(ethyleneglycol) block copolymer surfactant, indicating that drop trajectories during flow are perturbed by Surfactant Marangoni stresses that are controlled by the diffusion-limited sorption of surfactants.
60 citations
TL;DR: In this article, the authors deal with natural and Marangoni convection in hanging (or sitting) drop protein crystallizers, and show that for these configurations, solute transport is dominated by convection and that the convection velocities are one or even two orders of magnitude larger than the characteristic diffusion velocity.
60 citations
TL;DR: In this paper, the authors investigated the linear stability of a coupled set of equations describing the Marangoni spreading of a surfactant monolayer on a thin liquid support.
Abstract: Recent experiments by several groups have uncovered a novel fingering instability in the spreading of surface active material on a thin liquid film. The mechanism responsible for this instability is yet to be determined. In an effort to understand this phenomenon and isolate a possible mechanism, we have investigated the linear stability of a coupled set of equations describing the Marangoni spreading of a surfactant monolayer on a thin liquid support. The unperturbed flows, which exhibit simple linear behavior in the film thickness and surfactant concentration, are self-similar solutions of the first kind for spreading in a rectilinear geometry. The solution of the disturbance equations determines that the rectilinear base flows are linearly stable. An energy analysis reveals why these base flows can successfully heal perturbations of all wavenumbers. The details of this analysis suggest, however, a mechanism by which the spreading can be destabilized. We propose how the inclusion of additional forces acting on the surfactant coated spreading film might give rise to regions of adverse mobility gradients known to produce fingering instabilities in other fluid flows.
60 citations