Physics of Continuous Matter, Benny Lautrup , år 2005

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Physics of Continuous Matter, Benny Lautrup , år 2005, 1 udgave

Physics of Continuous Matter, Benny Lautrup 36.42University of Copenhagen, år 2005, 1 udgave

Physics of Continuous Matter Edition: 1
Isbn: 0 7503 0752 8
Publisher: Institute of Physics Publishing
January 2005
.. Due to the fact that the environment of a molecule at an interface is different than those of the bulk phase, an interface is always associated with surface free energy. The free energy per unit area, measured in terms of the surface tension (?), is the minimum amount of work required to create a new area of that interface [6]. Minimization of the interfacial contact area is therefore a spontaneous process. ...
... Therefore, it can be concluded that in a non-condensed liquid phase the curvature is a function of the surfactant parameter at the liquid-liquid interface. Here, we find surface tension at work, and consequently it results in a pressure imbalance across a curved surface [6]. The origin of the tendency to minimize the surface energy of oil droplets in water is due to the imbalance in forces acting on a molecule at the interface compared to those acting in the bulk. ...
... The origin of the tendency to minimize the surface energy of oil droplets in water is due to the imbalance in forces acting on a molecule at the interface compared to those acting in the bulk. From the basic fluid dynamics, we find that when a surface is curved there is a difference in pressure on the two sides of the surface which is described by the very important concept of "Laplace pressure" on the two sides of a curved (non-planer) surface, a spherical one being a special case of this in general [6]