منابع مشابه
Evaporating drops of alkane mixtures
Alkane mixtures are model systems where the influence of surface tension gradients during the spreading and the evaporation of wetting drops can be easily studied. The surface tension gradients are mainly induced by concentration gradients, mass diffusion being a stabilising process. Depending on the relative concentration of the mixture, a rich pattern of behaviours is obtained. keywords Movin...
متن کاملRescaling the dynamics of evaporating drops.
The dynamics of evaporation of wetting droplets is investigated experimentally in an extended range of drop sizes to provide trends relevant for a theoretical analysis. A model is proposed, which generalizes Tanner's law in the presence of evaporation. A qualitative agreement is obtained, which represents a first step toward the solution of a very old, complex problem.
متن کاملLarge Eddy Simulation of Jets Laden with Evaporating Drops
LES of a circular jet laden with evaporating liquid drops are conducted t o assess computational-drop modeling and three different SGS-flux models: the Scale Similarity model (SSC), using a constant coefficient calibrated on a temporal mixing layer DNS database, and dynamic-coefficient Gradient and Smagorinsky models (GRD and SMD, respectively). The GRD model was used for LES of an unforced jet...
متن کاملInfluence of substrate conductivity on circulation reversal in evaporating drops.
Nonuniform evaporation from sessile droplets induces radial convection within the drop, which produces the well-known "coffee-ring" effect. The evaporation also induces a gradient in temperature and consequently a gradient in surface tension, generating a Marangoni flow. Here we investigate theoretically and experimentally the thermal Marangoni flow and establish criteria to gauge its influence...
متن کاملSelf-excited hydrothermal waves in evaporating sessile drops
Pattern formation driven by the spontaneous evaporation of sessile drops of methanol, ethanol, and FC-72 using infrared thermography is observed and, in certain cases, interpreted in terms of hydrothermal waves. Both methanol and ethanol drops exhibit thermal wave trains, whose wave number depends strongly on the liquid volatililty and substrate thermal conductivity. The FC-72 drops develop cel...
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ژورنال
عنوان ژورنال: Colloids and Surfaces A: Physicochemical and Engineering Aspects
سال: 2007
ISSN: 0927-7757
DOI: 10.1016/j.colsurfa.2006.12.008