Aggregation aerosol dynamics

In the quadrature method of moments (QMOM) developed by McGraw [131], for the description of sulfuric acid-water aerosol dynamics (growth), a certain type of quadrature function approximations are introduced to approximate the evolution of the integrals determining the moments. Marchisio et al [122, 123] extended the QMOM for the application to aggregation-breakage processes. For the solution of crystallization and precipitation kernels the size distribution function is expressed using an expansion in delta functions [122, 123] ... 

In aerosol dynamics, it is possible to have more internal coordinates representing concentrations of reacting species requiring a multidimensional particle state of internal coordinates. Although we do not include this here, we next discuss a bubble aggregation process encountered in fluidized bed reactors, which involves similar features. 

In the quadrature method of moment (QMOM) a few moments of the number distribution function/ are tracked in time directly, just as for the standard MOM, but in this approach the requirement of exact closure is replaced by an approximate closure condition that allows the method to be applied under a much broader range of conditions. This method was first proposed by McGraw [151] for modeling aerosol dynamics and has later been extended to aggregation and breakage processes in crystallization by Marchisio et al. [141, 142]. 

Although DLS is most often used to size solid colloidal particles, the technique has also been applied to characterize aerosols [78,86,87], emulsion droplets [88,89], amphiphilic systems [90-92], and macromolecular solutions [12,16,93]. Another common application is the study of the fractal structure and kinetics of colloidal aggregation [94-102], More information about dynamic light scattering and its applications can be found in Refs. 23. 103 (104), and 105, in reviews, Refs. 11, 13, 36, 37, 49, 50, and 106, and in collections of papers Refs. 12. 14. 16. 93 (107), 105, and 108-114. 

Allen, M.D., Moss, O.R., and Briant, J.K.. 1978. Dynamic shape factors for LMFBR mixed-oxide fuel aggregates, J. Aerosol Sci.. 10. pp. 43-48. 

Hansson, H.C., Ahlberg, M.S., Dynamic shape factors of sphere aggregates in an electric field and their dependence on the Knudsen number. J. Aerosol Sci. 1985,16, 69. 

Energy transfer between a gas and some other system is a process of interest to workers in a number of areas. Depending on whether the second system is another gas molecule, a small aggregate of molecules, or a solid surface gas-phase kinetics, aerosol microphysics, or solid-state studies are involved. Energy-transfer theories are best developed for the gas-phase case where currently available methods provide reasonably reliable treatment for both the interactions and the collision dynamics. 

Abstract Aggregation dynamics of water-in-oil microemulsion containing polyacrylamide gels have been investigated. Gels were formed only in an aqueous phase of water-in-oil microemulsions composed of a surfactant Aerosol OT, iso-octane, and water. Increasing the temperature, the percolation transition first occurred and then the phase separation occurred. The percolation transition was characterized by a steep increase of the electrical conductivity, which was interpreted in... 

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