By Igor Agranovski
This self-contained guide and prepared reference examines aerosol technological know-how and expertise intensive, delivering an in depth perception into this innovative box. As such, it covers basic techniques, experimental equipment, and a large choice of purposes, starting from aerosol filtration to organic aerosols, and from the synthesis of carbon nanotubes to aerosol reactors.Written by way of a bunch of the world over popular specialists within the box, this is often a vital source for chemists and engineers within the chemical and fabrics disciplines throughout a number of industries, in addition to excellent supplementary studying in graduate point classes.
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Extra resources for Aerosols: Science and Technology
76) The condition for the realization of this asymptotics is α, β > 0. At β = 0 the singularity is weaker, ψ(x) ∝ 1/x1+γ , where 0 < γ < λ. It is not so difﬁcult to understand the physical meaning of this condition: the rate of interaction of small particles (g ∝ 1) with large ones (g 1) is on the order of K(1, g) ∝ g α and K(g, g) ∝ g λ , respectively, that is, the smaller particles interact with the larger ones much more slowly than the large ones between themselves (α ≤ λ). Strongly polydisperse mass spectra thus form, in which the role of larger particles is less than that of smaller ones.
The sinks of FAs in the atmosphere are: • diffusion deposition, which is smaller by g 2/D−2/3 in the free-molecule regime, and by g 1/D−1/3 in the continuum regime; • sedimentation losses, which are smaller by g 1/D−1/3 . Other mechanisms are as follows: • collapse by humidiﬁcation, in which water condensation on atmospheric fractals may effectively enlarge their fractal dimensionality by 10–15%, making them more and more compact; • water capture by (even hydrophobic) FAs; • scavenging by rain- and snowfall.
A huge literature is devoted to computer modeling of FA formation. It is summarized in the review article by Meakin . The mass spectrum of a growing FA meets the set of kinetic equations describing FA condensational growth. These equations were analyzed and solved by Lushnikov and Kulmala . Coagulation of fractals in the free-molecule regime was theoretically investigated by Wu and Friedlander [47, 48], who found considerable broadening of the particle mass spectra on decreasing the fractal dimensionality.