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Experiments to Simulate Effect of Marangoni Convection on ...
ABSTRACT. Stationary welds of sodium nitrate (NaNO 3, a high-Prandtl-number material) and gallium (Ga, a low-melti ng-point, low-Prandtl-number material) were made with a defocused CO 2 laser beam to simulate the effect of Marangoni convection on the shape of arc weld pools without a surface ...
Chapter 1 Introduction
1 Chapter 1 Introduction 1.1 The Marangoni effect In the beginning... This thesis is concerned with the influence of the Marangoni effect on mass transfer across a liquid-gas interface.
Marangoni flow revisited
A simple experiment shows that a fora 5%solution the Marangoni effect is not visible at all, while for the 40%solution it is very pronounced. In a careful experimental study, Fournieretal.
Interface Shape and Marangoni Effect Around a Bubble Within ...
J．of Thermal Science Vo1．7．No．1 Interface Shape and Marangoni Effect Around a Bubble Within the Thermal Boundary Layer X．F．Peng H．Y．Hu Thermal Engineering Department，Tsinghua University，Beijing 100084 China J．M．Ochterbeck Mechanical Engineering Department，Clemson ...
Interfacial Rheometry and the Stability of Foams and Emulsions
This mechanism of stabilization is referred to as Gibbs-Marangoni mechanism and is the key stabilization effect for surfactant molecules. Impurities in fluids behave like surfactants and are responsible for undesired foami ng during processing.
Numerical Analysis of Marangoni Convection with Free-slip ...
Wilson and Thess [33] studied the linear growth rates of long-wave modes without the restriction of near critical conditions for the coupled Benard-Marangoni problem. The effect of a vertical magnetic field on the linear growth rates of Marangoni convection in a fluid layer was investigated by Hashim and ...
A model for thermal Marangonidrying
Apart from facilitating the Marangoni effect, such an ultradry atmosphere provided for intensive water evaporation at the surface of the entrainment film.
Numerical simulation of the Marangonie#ectonmass transfer to ...
As for simulation of the Marangonie#ectatgas-liquid surface, Lee et al. (2003) reported the Marangoni convection induced by surfactant absorption into liquid falling 3lm.
Solutal Marangoni Convection: Mass Transfer Characteristics
From figure 3 several conclusions can be drawn. For Bi N = 13.1 and Ma = 10 5, the Marangoni effect starts to accelerate the mass transfer only after t = 0.9.
ADVANCED MOLECULAR DEFOAMER TECHNOLOGY K.Vinoth, Application ...
The following effects are involved: • electrostatic repulsion of the treated surfaces • steric effects • surface effects such as the Gibbs-Marangoni effect which counteract stronger drainage of the lamella • the Gibbs-Marangoni elasticity of the foam lamella MARANGONI EFFECT: The Gibbs-Marangoni ...
