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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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Journal ArticleDOI
TL;DR: In this paper, the dissipative layers, called Marangoni boundary layers, that can be formed along the interface of two immiscible fluids, in surface driven flows are studied under the hypothesis that the flow fields of the two interfacing fluids are uncoupled.
Abstract: The paper deals with the dissipative layers, called Marangoni boundary layers, that can be formed, along the interface of two immiscible fluids, in surface driven flows. Under the hypothesis that the flow fields of the two interfacing fluids are uncoupled, similar solutions are studied for the case in which an external pressure gradient is present. The similarity class is derived and the pertinent equations are solved numerically by mean of an algorithm based on a Quasi-Linearization Technique.

39 citations

Journal ArticleDOI
TL;DR: In this article, the coupled thermogravitational and thermocapillary instability in a thin fluid layer of a viscoelastic medium heated from below is investigated, and a linear and a weakly nonlinear analysis are successively presented.
Abstract: The coupled thermogravitational and thermocapillary instability in a thin fluid layer of a viscoelastic medium heated from below is investigated. A linear and a weakly nonlinear analysis are successively presented. The viscoelastic medium is modelled by means of a general rheological model including the lower convected, the upper convected, and the co-rotational Jeffreys models as particular cases. in comparison with previous analyses, two new dimensionless numbers are introduced, namely the so-called gravitational and rate of heating numbers instead of the classical Rayleigh and Marangoni numbers. The critical values for the temperature gradient, wave number and oscillation frequencies corresponding to the onset of convection are determined from a linear approach. After motion has set in, particular patterns are predicted taking the form of either rolls, or hexagon, or squares. By means of a nonlinear technique, restricted to steady situations, it is determined under which specific conditions one pattern is preferred. The influence of the constitutive equation, the Prandtl and the Blot numbers is examined and discussed in details. (C) 2000 Elsevier Science B.V. All rights reserved.

39 citations

Journal ArticleDOI
12 Nov 2002-Langmuir
TL;DR: In this paper, single and double-beam instrumentations were developed for monitoring the deformation generated on the solution surfaces and to detect the influence of surfactants, such as hexadecanol, DPPC, and cardiolipin.
Abstract: Marangoni convection was induced by laser heating in shallow layers of solutions of crystal violet in ethylene glycol and water. Single- and double-beam instrumentations were developed for monitoring the deformation generated on the solution surfaces and to detect the influence of surfactants. In the single-beam configuration, the depression of the liquid surface acted as a converging lens, focusing the reflected beam, and the magnitude of the lens effect was measured as in a classical thermal lens experiment. In the double-beam configuration, the depression of the surface was induced by a pump beam, and the deflection of a probe beam reflected on the surface near the deformed region was monitored by a position sensor detector. The influence of surfactants as hexadecanol, DPPC, and cardiolipin was studied by forming monolayers on the surface of the solutions. The results showed that the lens effect, as well as the deflection of the probe beam, can be suppressed by a small amount of surfactant deposited on...

39 citations

Journal ArticleDOI
TL;DR: In this article, the authors quantify the effect of Marangini convection on the absorption performance for the ammonia-water absorption process, and visualize Marangoni convection that is induced by adding a heat transfer additive, n -octanol.
Abstract: The objectives of this paper are to quantify the effect of Marangini convection on the absorption performance for the ammonia–water absorption process, and to visualize Marangoni convection that is induced by adding a heat transfer additive, n -octanol. A real-time single-wavelength holographic interferometer is used for the visualization using a He–Ne gas laser. The interface temperature is always the highest due to the absorption heat release near the interface. It was found that the thermal boundary layer (TBL) increased faster than the diffusion boundary layer (DBL), and the DBL thickness increased by adding the heat transfer additive. At 5 s after absorption started, the DBL thickness for 5 mass% NH 3 without and with the heat transfer additive was 3.0 and 4.5 mm, respectively. Marangoni convection was observed near the interface only in the cases with heat transfer additive. The Marangoni convection was very strong just after the absorption started and it weakened as time elapsed. It was concluded that the absorption performance could be improved by increasing the absorption driving potential ( x vb − x vi ) and by increasing the heat transfer additive concentration. The absorption heat transfer was enhanced as high as 3.0–4.6 times by adding the heat transfer additive that generated Marangoni convection.

39 citations

Journal ArticleDOI
TL;DR: In this paper, the absorption of CO 2 at a plane interface by water and aqueous solutions of surfactants was measured in the presence and in the absence of Marangoni effect induced by deposition of a variety of liquids of low surface tension on the gas-liquid interface.

39 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023212
2022421
2021289
2020283
2019217
2018247