Interaction diffusion

Watson E.B. and Jurewicz S.R. (1984) Behavior of alkalies during diffusive interaction of granitic xenoliths with basaltic magma. /. Geol. 92, 121-131. 

Some resemblance with the diffusion interaction, discussed in Section I,C cannot be denied. At diffusion interaction, however, the interaction occurs continuously and not only at regular intervals. Also, in the diffusion interaction model the interaction is never complete but only tends to reduce the driving force. 

In practice, RSPs rarely operate at thermodynamic equilibrium. Therefore, some correlation parameters, such as tray efficiencies or HETS values, have been introduced to adjust the equilibrium-based theoretical description to reality. For multicomponent mixtures, however, this concept often fails, since diffusion interactions of several components result in unusual phenomena such as osmotic or reverse... 

The simulation of hydrogen by muons has proved to be extremely valuable in the identification of potential sites for hydrogen in semiconductors and insulators. Although the muon has a mass one-ninth that of the proton, its interaction with the host lattice, both electronically and chemically, is virtually identical to that of a proton. During its 2.2 microsecond lifetime (experiments are frequently undertaken over a timescale of up to ten lifetimes), the muon can diffuse, interact with, and adopt positions in the lattice that protons themselves would occupy. If the temperature is sufficiently low, muons can capture electrons to form muonium atoms. The reduced mass of muonium is within 0.5% of that of... 

Diffusive interactions of VOCs with the surfaces of building walls, floors and household materials have been the subject of several experimental investigations, modelling and simulation [90,97-100]. Such interactions regulate peak levels of indoor VOCs, while subsequent desorption of the adsorbed VOCs delays their disappearance from indoor environments. In order to predict and model the VOC emission rates of indoor materials, it is essential to know the diffusion and partition coefficients of individual VOCs. Bodalal et al. [98] recently described an experimental method for the determination of the... 

Supercritical conditions above P > Fm) or below P < P ) the mixture critical curve lead to different crystallization and aggregation mechanisms (7,20). In the first case there is no interfacial tension, and mass transfer is determined by the flow-molecular diffusion interactions during mixing, defined here as jet mixing. In the second case, there is interfacial tension between the phases, and the mixing mechanism is based on atomization to small droplets while energy and species are being transferred between the... 

Under these conditions we have a reverse coattail effect. It can be understood as follows A small Kq implies a poor solvent-diffusant interaction (large positive xf) the diffusant prefers to remain in the polymer phase in the absence of solvent absorption. When solvent is absorbed, the diffusant now "sees" a thermodynamic environment in the polymer phase that is similar to the one in the solvent phase, neither of which it likes. 

In Section 2.9, various aspects were considered of the hydrodynamics of a constrained flow past a system of particles based on the cell model. Here we briefly describe mass and heat transfer in such systems at high Peclet numbers. We investigate either sufficiently rarefied systems of particles or systems with an irregular structure, where the diffusion interaction of isolated particles can be neglected. (Regular disperse systems, where the interaction between diffusion wakes and boundary layers must be taken into account, were investigated in [172, 365].)... 

We are attempting to computer model ion transport through Nations by generating sample membrane cubes. These cubes contain the structures determined from our theory of ionomer structure. Once a sample cube is generated, we computer simulate the migration of solvated anions (OH") and cations (Na+) through the membrane sample cube under the potential of an applied field. Electrostatic and diffusion interactions are computed with respect to the explicit structure of the sample... 

The dynamics is governed by interactions between different domains of the minority phase. At late times these will have attained spherical (circular) shape for a three (two)-dimensional system. For model B systems, the classic work of Lifshitz and Slyozov [38] and the independent work by Wagner [39] form the theoretical cornerstone. The late-stage dynamics is mapped onto a diffusion equation with sources and sinks (i.e. domains) whose boundaries are time dependent. The Lifshitz-Slyozov (LS) treatment of coarsening is based on a mean field treatment of the diffusive interaction between the domains and on the assumption of an infinitely sharp interface with well defined boundary conditions. The analysis predicts the onset of dynamical scaling. As in section A3.3.3.1 we shall denote the extent of the off-criticality by > 0. The majority phase... 

Consider now application of the obtained relation to diffusion interaction of particles. Denote through r the distance between centers of two particles. As was shown in [19], main diffusion resistance to the particles approach lies within the region r < Ao, that is the basic resistance that particles exhibit, occurs when the clearance between their surfaces is <5 < Ao — (Ri + R2), where i i and R2 are radii of particles. The factor of diffusion according to (11.53) is equal to... 

Isothermal conditions will be dealt with in this section to study the diffusion effect and will consider the nonisothermal conditions in the next section to investigate the coupled effect of diffusion interaction among species and the heat release. 

Godleski, D. A., and J. B. Grotberg, Convection-diffusion interaction for osciilatory flow in a tapered tube, Journal of Biomechanical Engineering—Transactions ofASME, 110 283-291, 1988. 

Pop] Popov, V.V., Diffusion Interaction of Carbides, Nitrides and Carbonitrides With Iron and Steels , Metallofizika Nov. Tekhnol, 21(2), 99-103 (1999) (Phase Relations, Experimental, Transport Phenomena, 11)... 

Phase relations in the C-Fe-W system are of great interest above all because of the importance of tungsten as alloying element in steels. Therefore constitution of this system has been studied quite intensively. Other important aspects of this subject, in particular the dissolution of iron carbides during austenitization of tungsten steels, phase transformations of carbides as well as diffusion interaction of carbides with iron and steels also attract attention of investigators widely. Details of experimental studies of phase relations, crystal strac-tures and thermodynamics as well as applied techniques are presented in Table 1. 

Pop] Popov, VV, Diffusion Interaction of Carbides, Nitrides and Carbonitrides with Iron and... 

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