Diffusivities thermal

Diffuse-thermal instabilities involve the relative diffusion reactants and heat within a laminar flame. These are the smaHest-scale instabilities (11). 

Protecting a surface from corrosion by coating can be accomplished by a number of well-established processes which include paints, metal plating (with zinc or cadmium), diffusion, thermal spraying, and, more recently, vapor deposition processes. Of these physical vapor deposition (PVD) is used extensively in corrosion protection. Typical applications are ... 

Kaiser, C., Liu, J.B., and Ronney, P.D., Diffusive-thermal instability of counterflow flames at low lewis number, 38th Aerospace Sciences Meeting and Exhibit, AIAA Paper 2000-0576, 2000. 

Molecular sieves, membrane permeation Molecular distillation Gaseous diffusion, thermal diffusion Filtration, sieves... 

Gas centrifuge Chemical exchange Chromatography Gaseous diffusion Thermal diffusion Distillation... 

Typical methods for generation of polymorphs include sublimation, crystallization from different solvents, vapor diffusion, thermal treatment, melt crystallization, and rapid precipitation. High-throughput screening methods have been reported for polymorph screening.50... 

More details of the derivation of the diffusion/thermal equation can be found in Maaloe (1985) and Schubert et al. (2001). 

In Eqs. (3.58) and (3.59), the kt are the reaction rate constants. We will see in Chapter 4 that many solid-state ceramic processes involve simultaneous mass transport (diffusion), thermal transport, and reaction. 

Fig. 7.93. Influence of location on boundary layer thickness in laminar flow along an electrode 8,8p and 8V are the thicknesses of the diffusion, thermal, and hydrodynamic boundary layers, respectively.

The phenomenon of diffusion may be used to separate various materials, Benedict and Halle et al in Kirk Othmer (Refs 12 27) describe several devices for diffusion separations, such as mass diffusion, thermal diffusion gas diffusion apparatuses... 

Diffusion, Thermal, of Halides in Aqueous Solution (Chanu). . 13 349... 

In order to calculate the numerical values of transfer coefficients, values of the molecular properties are required. In the next section, we present estimation methods for viscosity, diffusivity, thermal conductivity and surface tension, for the high-pressure gas. 

The diffusion, thermal diffusion, and Soret coefficients for nine different PDMS concentrations from c = 0.09 to c = 0.9 have been measured between the binodal temperature and approximately 368 K. Figure 8 shows on the left side the diffusion and thermal diffusion coefficients. The temperature dependences of the latter are very well described as thermally activated processes according to (11) with a common activation temperature Ta = 1,395 K, which is very close to the 1,460 K obtained for the critical blend in Sect. 2. 

The diffusion, thermal diffusion, and Soret coefficients of this system are shown in Fig. 8. Samples of two different off-critical compositions (c = 0.3 and c = 0.9) were prepared. The temperature was set to a value of a few degrees above the bin-odal. Hence, the sample was entirely within the homogeneous phase and one would expect that heating could only drive the blend further into the stable one-phase region. 

Disperse Dyes. These are substantially water-insoluble nonionic dyes for application to hydrophobic fibers from aqueous dispersion. They are used predominantly on polyester and to a lesser extent on nylon, cellulose, cellulose acetate, and acrylic fibers. Thermal transfer printing and dye diffusion thermal transfer (D2T2) processes for electronic photography represent niche markets for selected members of this class (see Chapter 6). 

No pressure diffusion, thermal diffusion, or forced diffusion (e.g., electrophoresis)... 

Eilek, J. 1999, in "Diffuse Thermal and Relativistic Plasma in Galaxy Clusters", H. Boehringer, L. Feretti, P. Schuecker Eds., p. 

Taken together with the results from the photoinduced electron-transport experiments in which diffusive thermal electron hopping can occur over a few... 

Keywords Metal-hydride composite materials Thermal diffusivity Thermal conductivity ... 

The shape of glassware can be a clue as to how and/or where it can be used. The more rounded its comers, the better it can diffuse thermal stress. This idea is similar in concept to the sharpness of flaws and can be compared to Eq. (1.1), the stress concentration factor. Although that equation is intended to be used for surface flaws on glass, the principle is the same. 

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