By Sheldon K. Friedlander
Excellent for classes in aerosol technology or particle expertise, Smoke, dirt, and Haze: basics of Aerosol Dynamics, 2/e, is the one glossy textual content that makes a speciality of aerosol dynamics--the examine of the standards that be sure alterations within the distribution of aerosol houses with recognize to particle dimension. It covers basic strategies, experimental equipment, and a large choice of purposes. utilizing the aerosol dynamics strategy, the writer integrates a vast variety of themes together with stochastic strategies, aerosol delivery thought, coagulation, formation of agglomerates, classical nucleation concept, and the synthesis of ultrafine good debris. The ebook makes huge use of scaling techniques and dimensional research and emphasizes actual and physicochemical interpretations. uncomplicated options are illustrated through purposes to many fields together with pollution keep watch over, the atmospheric sciences, microcontamination within the semiconductor undefined, and the economic manufacture of powders, pigments, ingredients, and nanoparticles. Revised and multiplied, this moment variation positive factors new chapters at the kinetics of agglomeration of noncoalescing debris and the basics of aerosol reactor layout. It covers the consequences of turbulence on coagulation and gas-to-particle conversion and likewise discusses the formation of fundamental debris by means of the collision-coalescence mechanism. The bankruptcy at the atmospheric aerosol has been thoroughly rewritten in the aerosol dynamics framework. Its uncomplicated procedure and topicality make Smoke, dirt, and Haze: basics of Aerosol Dynamics, 2/e, a vital consultant for either scholars and researchers.
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Additional resources for Smoke, Dust, and Haze: Fundamentals of Aerosol Dynamics
16) is the total concentration of particles in the aerosol at a given point and time. The first moment. 17) when divided by the zeroth moment, gives the number average particle diameter. l7a) Mo The secollt! 18) where A is the total surface area per unit volume of fluid in the disperse system. The average surface area per particle is given by 7r M2 1Mo = AI Noo • The turbidity of coarse aerosols composed of particles much larger than the wavelength of the incident light is also proportional to this moment.
It should be noted that the length dimensions L and I are not interchangeable. In dimensional analyses of equations involving the size distribution function, both characterist ic lengths should be treated independently. Dimensionality plays an important role in the derivation of scaling laws for the distribution fu nction as discussed later in this chapter. When there is a direct physical interaction between the particulate and gas phases, the two length dimensions become interchangeable. An example is the increase in viscosity of a fluid due to the presence of suspended particles.
1 6). 25) where R«() is the Lagrangian velocity correl ation coeffici ent for the particle motion and B is a time variable fo r the motion of the particle. Thus the length scale e pa is the distance over which there is significant correlation between the movement of the particle at () = 0 and some later time. 24) equal to the Stokes-Einstein relation (2. 26) where m is the particle mass. 26) and are shown in Fig. 4 for particles of density I g cm- 3.