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 paper, the authors considered the instantaneous distribution of mass and thermal fluxes inside and outside of an evaporating sessile droplet using computer simulations and calculated the latter distribution in a self consistent way by considering an interconnected problem of vapour transfer in the vapour phase outside the droplet, heat transfer in vapour, liquid and solid substrate, and Marangoni convection inside the liquid droplet.
63 citations
TL;DR: In this paper, a numerical method is implemented for investigating the effect of an insoluble surfactant on the deformation of, and structure of the flow around a two-dimensional drop with arbitrary viscosity in simple shear flow.
63 citations
TL;DR: In this paper, the migration of an isolated gas bubble in an immiscible liquid possessing a temperature gradient is analyzed in the absence of gravity, where the driving force for the bubble motion is the shear stress at the interface which is a consequence of the temperature dependence of the surface tension.
63 citations
TL;DR: There is a bifurcation from a motionless state to a propagating state of droplet by changing the strength of the Marangoni effect.
Abstract: We study self-propelled dynamics of a droplet due to a Marangoni effect and chemical reactions in a binary fluid with a dilute third component of chemical product which affects the interfacial energy of a droplet. The equation for the migration velocity of the center of mass of a droplet is derived in the limit of an infinitesimally thin interface. We found that there is a bifurcation from a motionless state to a propagating state of droplet by changing the strength of the Marangoni effect.
63 citations
TL;DR: The first evidence of the Marangoni convection near growing hydrogen bubbles, generated by water electrolysis, is provided and the results indicate a clear correlation between the magnitude of theMarangonia convection and the electric current.
Abstract: Electrolytic gas evolution is a fundamental phenomenon occurring in a large number of industrial applications. In these processes gas bubbles are formed at the electrode from a supersaturated solution. Since dissolved gases can change the surface tension, a gas concentration gradient may cause the surface tension to vary locally at the interface of the gas bubble. Surface tension gradients may also form due to temperature gradients generated by ohmic heating of the electrolyte. In both cases, the resulting shear stress imposes a convection in the electrolyte and the gas bubble (Marangoni effect). This phenomenon may influence the entire electrolytic gas evolution process, e.g., by an enhanced mass transfer. In this study, the first evidence of the Marangoni convection near growing hydrogen bubbles, generated by water electrolysis, is provided. Microscopic high speed imaging was applied to study the evolution of single hydrogen bubbles at a microelectrode. The convection near the interface of the growing bubble was measured by using a time-resolved Particle Tracking Velocimetry (PTV) technique. The results indicate a clear correlation between the magnitude of the Marangoni convection and the electric current.
63 citations