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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the governing equations for laminar falling liquid films over a heated plate with constant surface temperature were solved and the surface temperature profile of the film was obtained by considering the surface tension gradient and shrinkage characteristics in the brim of the heated film, a shrinkage model that gives the film interfacial area was derived based on the experimental infrared images.
Abstract: A liquid film flowing down along a heated solid surface may be substantially influenced by the Marangoni effect, which arises from the existence of a surface tension gradient that is induced by the variations of surface temperature in the transverse direction of the film, causing appreciable contraction of the film. In this work, the governing equations for laminar falling liquid films over a heated plate with constant surface temperature were solved and the surface temperature profile of the film was obtained. By considering the surface tension gradient and shrinkage characteristics in the brim of the heated film, a shrinkage model that gives the film interfacial area was derived based on the experimental infrared images. A comparison of the model with experimental data shows that the model can satisfactorily describe the flow characteristics of falling heated films. The model is expected to be useful for the design and operation of falling film equipments. © 2005 American Institute of Chemical Engineers AIChE J, 2005
38 citations
TL;DR: Marangoni convection in a liquid film supported by a substrate with periodic temperature distribution is modeled by solution of steady state creeping flow equations and predicts interaction between Marangoner convection induced by non-uniform wall heating and the Marangoni short-wave instability.
38 citations
TL;DR: In this article, the formation of a dynamic spiral string of particles with larger density than the fluid was investigated for time-dependent thermocapillary flow in liquid bridges under various gravity conditions including microgravity.
Abstract: The formation of a dynamic spiral string of particles with larger density than the fluid was investigated for time-dependent thermocapillary flow in liquid bridges under various gravity conditions including microgravity. The dynamic spiral string forms after approximately 20–60 oscillation periods from the homogeneous dilute particle suspension. It was found that the action of gravity is not decisive in the process of the particle accumulation structure (PAS) but gravity influences the flow field for PAS-formation. We could realize and observe PAS with modal structure m=3 under μ-g but modal structure m=2 occurred only during a transient of the operating parameters in an aspect ratio-range different from that under normal gravity. The correlation of the optically observed PAS structure with the temperature structure of the azimuthally rotating hydrothermal wave on the free surface is the same under microgravity as under normal gravity indicating that PAS is a pure Marangoni effect.
38 citations
TL;DR: The Gibbs dividing surface model and the diffuse interface model are two main continuum frameworks used for modeling the dynamics of soft multiphase systems as discussed by the authors, and they have been applied to a wide range of phenomena, such as mixing and demixing in binary mixtures, buoyancy driven detachment of wall-bound droplets, droplet breakup and coalescence, Marangoni effects, and flow in nano- and microchannels.
38 citations
TL;DR: In this paper, a quasi-stationary model for the flow inside evaporating binary sessile and pendant droplets was derived and validated, which successfully allows one to predict the prevalence and the intriguing interaction of Rayleigh and/or Marangoni convection on the basis of a phase diagram.
Abstract: For a small sessile or pendant droplet it is generally assumed that gravity does not play any role once the Bond number is small. This is even assumed for evaporating binary sessile or pendant droplets, in which convective flows can be driven due to selective evaporation of one component and the resulting concentration and thus surface tension differences at the air–liquid interface. However, recent studies have shown that in such droplets gravity indeed can play a role and that natural convection can be the dominant driving mechanism for the flow inside evaporating binary droplets (Edwards et al., Phys. Rev. Lett., vol. 121, 2018, 184501; Li et al., Phys. Rev. Lett., vol. 122, 2019, 114501). In this study, we derive and validate a quasi-stationary model for the flow inside evaporating binary sessile and pendant droplets, which successfully allows one to predict the prevalence and the intriguing interaction of Rayleigh and/or Marangoni convection on the basis of a phase diagram for the flow field expressed in terms of the Rayleigh and Marangoni numbers.
37 citations