The Dimensional Dependences of the Thermophysical Properties of Nanoparticles: Surface Tension
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Phase boundary
Tension (geology)
Particle (ecology)
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In this paper, using an unified approach, estimates are given of the magnitude of the surface tension of water for planar and curved interfaces in the pairwase interaction approximation based on the Lennard-Jones potential. It is shown that the surface tensions of a bubble and droplet have qualitatively different dependences on the curvature of the surface: for the bubble, as the radius of the surface's curvature decreases, the surface tension decreases, whereas it increases on the droplet. The corresponding values of the Tolman corrections are also determined. In addition, it is shown that the dependence of the surface tension on the surface's curvature is important for evaluating the critical negative pressure for the onset of cavitation.
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We examine the dynamics of a spiralling slender liquid jet which emerges from a rotating cylindrical drum. Such jets arise in the manufacture of fertiliser and magnesium pellts in the prilling process. Exploiting the slenderness of the jet we determine the steady trajectory of the jet, and find that at leading-order it is a function of the rotation rate of the drum, the surface tension and density of the liquid, the exit speed and exit radius of the jet, the radius of the cylinder, but not of the viscosity of the liquid. We carry out a linear stability analysis of the steady solution, using both inviscid and viscous perturbations, and considering both temporal and spatial stability. We compare our results to experiments, obtaining favourable agreement.
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Various values of surface tension of quartz have been given already but reliability of those values is very questionable.Author observed the surface tension of amorphous quartz fibre (radius 0.3-10μ) and found that the relation between radius and surface tension was shown as follows w=πr2σ+2πr·γ; w: weight which is necessary for breaking of quartz fibre; r: radius;σ: tensile strength;γ: surface tension The values of σ and γ of quartz fibre were found to be 65 kg/mm2 and 1348480 dyne/cm, respectively.
Tension (geology)
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Particle (ecology)
Tension (geology)
Lennard-Jones potential
Dynamics
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Abstract A new model, called STICT for surface thermodynamics using ideal chemical theory, is developed for the surface tension of liquid metal alloys. It uses the Guggenheim approach to relate surface phase properties to those in the bulk. For strongly solvated metal mixtures, ideal chemical theory is used to characterize bulk properties. The STICT model fits experimental data well for the seven systems for which sufficient data exist. Moreover, calculations of bulk and surface true compositions give some guidance to the tailoring of the surface properties of alloys for various applications.
Ideal solution
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Combining with a thermodynamical definition, an extension of Harasima's statistical-mechanical method to calculate the plane surface tension leads to general expressions for the surface tension of cylindrical and spherical interface. A new definition of “surface of tension” is introduced and the familiar Kelvin relation is derived more strictly by using this definition than by the traditional method. From the point of view of this definition Tolman's conclusion on the curvature dependency of surface tension turns out to be questionable and necessary to be reexamined.
Tension (geology)
Capillary length
Capillary surface
Specific surface energy
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