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, a general formalism is developed to study interfacial convective instability of two immiscible incompressible fluids, and a linear stability analysis is performed and restricted to pure longitudinal perturbations for long wavelengths.
45 citations
TL;DR: In this paper, a two-phase lattice Boltzmann method was developed to simulate axisymmetric thermocapil- lary flows by an improved color-gradient model.
45 citations
01 Apr 1992
TL;DR: In this paper, it was shown that the Marangoni elasticity induced by the isothermal transfer of a surface active solute between two adjacent immiscible bulks could result in convective motion.
Abstract: Sternling and Scriven1 showed that the Marangoni elasticity induced by the isothermal transfer of a surface active solute between two adjacent immiscible bulks could result in convective motion.
45 citations
TL;DR: In this article, the effect of nanoparticle aggregation on the heat transfer rate was investigated by utilizing response surface methodology and estimating the sensitivity of the heattransfer rate toward the effective parameters: radiation parameter, magnetic parameter, and nanoparticle volume fraction.
Abstract: The sensitivity analysis of the magnetohydrodynamic thermal Marangoni convection of ethylene glycol (EG)-based titania (TiO2) nanoliquid is carried out by considering the effect of nanoparticle aggregation. The rate of heat transfer is explored by utilizing response surface methodology and estimating the sensitivity of the heat transfer rate toward the effective parameters: radiation parameter (1 ≤ R ≤ 3), magnetic parameter (1 ≤ M ≤ 3) and nanoparticle volume fraction $$(1\% \le \phi \le 5\%$$
). The heat transfer phenomenon is scrutinized with thermal radiation and variable temperature at the surface. The effective thermal conductivity and viscosity with aggregation are modeled by using the Maxwell–Bruggeman and Krieger–Dougherty models. The governing equations are solved by using the apposite similarity transformations. It is found that when the effect of aggregation is considered, the velocity profile is lower. A positive sensitivity of the Nusselt number toward thermal radiation is observed. Further, a negative sensitivity of the heat transfer rate is observed toward the magnetic field and nanoparticle volume fraction.
45 citations
TL;DR: In this article, the linear stability analysis of a layer of a magnetic fluid with a deformable free surface, which is heated from below and exposed to a uniform, vertically applied magnetic field is presented.
Abstract: The linear stability analysis of a layer of a magnetic fluid with a deformable free surface, which is heated from below and exposed to a uniform, vertically applied magnetic field is presented. In this configuration the temperature dependence of the surface tension, the buoyancy and the focusing of the magnetic field due to surface fluctuations act as destabilising effects. We show that this system has for thin layers a stationary codimension-2-point, which can be reached for experimentally relevant values of the material parameters. We also analyse the transition from thin to thicker layers for which there is no codimension-2-point and we show how the codimension-2-point disappears. Finally we demonstrate that there is no oscillatory instability in the regions of parameter space considered here.
45 citations