By W. H. Marlow (auth.), William H. Marlow Ph. D. (eds.)
The recommendation by way of Dr. Franklin S. Harris, Jr. , that those books be written arose pursuant to the editor's plaints that regardless of the implicitly or explicitly ack nowledged value of either aerosols and particulate subject in innumerable domain names of know-how and human welfare, investigations of those topics have been commonly no longer supported independently of the narrowest available domain names in their appli cations. Frank Harris, who has lengthy been a contributor in a single of the $64000 domain names of aerosol macrophysics, atmospheric optics, challenged the editor to intricate his perspectives. preferably, they'd have taken the shape of a monograph; despite the fact that, there's as but an inadequate physique of knowledge to give a unified remedy. while, significant efforts are in growth within the part fields to carry the promise for the emergence of unifying components as a way to even tually facilitate their presentation to be made with a excessive measure of integrity. there are various pertinent and systematic tie-ins among project-oriented aerosol paintings and uncomplicated actual investigations that are themselves really heavily equivalent to a lot classical and present paintings in actual technological know-how. the main major element of those tie-ins is their strength for making large contributions to the practical wishes of the functions parts whereas stimulating major questions of simple physics. For this to be attainable, it will be significant that the main proper components of physics be pointed out in this sort of demeanour as to clarify their re levance for aerosol-related experiences and vice versa.
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The advice through Dr. Franklin S. Harris, Jr. , that those books be written arose pursuant to the editor's plaints that regardless of the implicitly or explicitly ack nowledged significance of either aerosols and particulate topic in innumerable domain names of expertise and human welfare, investigations of those topics have been mostly no longer supported independently of the narrowest possible domain names in their appli cations.
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Extra info for Aerosol Microphysics I: Particle Interaction
In general, a critical test of empirical or theoretical results for the dynamics of ultrafine particles is afforded by examination of the behavior of the result with respect to the surface-gas accommodation. 84,99]. LOYALKA et al. 67) This is close to "exact" values calculated numerically from the BGK analysis. It is known that Maxwell's and Knudsen's boundary conditions are not correct in the slip regime. 68) Here ~22 is the tangential momentum accommodation coefficient, ~25 and ~55 are "second-order" coefficients.
75) by a variational method agree with Millikan's empirical equation to within 2 percent. The defect in these results is that they are purely numerical and assume perfect accommodation. 108] have studied isothermal drag by means of an expansion about Kn i = 0 with the the linearized BGK model. 64) well for small Kn .. An additional test of the various analyses of the drag-force problem is afforded by the near-free-molecular behavior. 76) where E~ is the free-molecular drag force. 76) for various analyses of the dragforce problem.
V -g )dVg gives the probability that a gas molecule hitting the surface with velocity Ygl would be reflected with a velocity lying in the range yg,dv g . A still more ambitious program would be to treat the gas-surface problem by starting with the Liouville equation for the entire system. 84]. 51) v' -g = v-g - 2n(n - - . v-g ) In this simple assumption, a fraction a of the molecules leave the surface as a Maxwellian stream equilibrated with the surface, and a fraction (1 - a) are specularly reflected.
Aerosol Microphysics I: Particle Interaction by W. H. Marlow (auth.), William H. Marlow Ph. D. (eds.)