Physicochemical Hydrodynamics: Interfacial Phenomena by Andreas Acrivos (auth.), Manuel G. Velarde (eds.)

By Andreas Acrivos (auth.), Manuel G. Velarde (eds.)

This ebook comprises lecture notes and invited contributions offered on the NATO complicated examine Institute and EPS Liquid kingdom convention on PHYSICOCHEMICAL HYDRODYNAMICS-PCH: INTERFACIAL PHENOMENA that have been held July 1-15, 1986, in los angeles RABIDA (Huelva) SPAIN. even supposing we're conscious of the trouble in organizing the contents end result of the huge and multidisciplinary points of PCH-Interfacial Phenomena, we've attempted to accomodate papers by means of subject matters and feature now not the order within the presentation on the conferences. there's additionally no contrast among the ASI notes and convention papers. we've got performed our greatest to provide a assurance as whole as attainable of the sector. in spite of the fact that, we had problems coming from the truth that a few authors have been so busy that both didn't locate time to post their contribution or didn't have time to put in writing a finished paper. We additionally needed to deal with very overdue arrivals, postdeadline worthwhile contributions that we felt needed to be integrated the following. Our gratitude is going to the NATO clinical Affairs department for its monetary aid and to the EPS Liquid nation Committee for its sponsorship. monetary aid additionally got here from Asociacion Industrias Quimicas-Huelva (Spain), Caycit-Ministerio De Educacion Y Ciencia (Spain), Canon-Espana (Spain), Citibank-Espana (Spain), CNLS-Los Alamos Nat. Lab. (U. S. A. ), CSIC (Spain), EPS, ERT (Spain), ESA, Fotonica (Spain), IBM-Espana (Spain), Junta De Andalucia (Spain), NATO, NSF (U. S. A. ), ONR-London (U. S. A.

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Extra resources for Physicochemical Hydrodynamics: Interfacial Phenomena

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Different mechanical stimuli are then applied through the supporting discs (stretching, vibration, ~otation) and the liquid bridge c D a b L/(2R) Fig 6. Stability limits for a floating zone of liquid volume V, held between equal discs of radius R a distance L apart. Curves a, band c correspond to spherical, cylindrical and catenoidal shapes, respectively (in between are unduloids and outside nodoid-shapes). OA corresponds to minimum volume due to edge detachment, AB to symmetric instability (symmetric breakage respect to the mid plane between discs), BC to asymmetric breaking, and OD to maximum practical liquid volume (limit by edge overflow).

1. [IJEEEBDRJ ~[ij[±j[i] [[J[IJ~W Fig. 1. Some axisymmetric fluid interface configurations of interest. Another interesting classification from the point of view of materials science is: liquid-vapour, liquid-gas and liquid-liquid (immiscibles), for fluid interfaces,and liquid-solid, solid-vapour, solid-gas, solid- solid (grain boundaries) and solid-solid (distinct solids), for solid interfaces. When two interfaces meet, a triple line exists that, if not anchored to a well defined edge, poses many problems both in practice (for positioning and handling) and in theory (for modeling the virtual displacements in stability studies).

A van-der-Waals-type of model for the occurrence of interfaces. Fluid/fluid interfaces have great mobility, but solid/fluid interfaces lack it, their characteristic times are much longer and consequently they are normally under non-equilibrium conditions. Diffusion through interfaces and adsorption at them are vast subjects of research not dealt with here. It is seen thence that interfaces appear as a consequence of thermodynamic instability, but why should interfaces have thermodynamic properties of their own and not be simply a geometrical surface separating two uniform different phases?

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