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  • 1
    ISSN: 1572-9613
    Keywords: Hydrodynamic effects on collisions ; aerosol particle gravitational coagulation ; acoustical detection of collisions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A sphere falling in a fluid may collide with another sphere falling more slowly if, when the spheres are far apart vertically, the horizontal distance between their centers is less than or equal to a critical radius. Accurate prediction of aerosol particle coagulation requires a good understanding of this process. Previously reported optical techniques for measuring hydrodynamic effects on this phenomenon have inherent difficulties detecting grazing collisions and hence in determining the critical radius. In this work, a novel detection technique is demonstrated and it is shown that the critical radius may be determined from the sound generated by the collision of two spheres in a viscous liquid. The technique is shown to provide a more precise and decisive indication of when hard spheres collide.
    Type of Medium: Electronic Resource
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  • 2
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    Elsevier
    In:  Journal of Colloid and Interface Science, 76 (2). pp. 541-556.
    Publication Date: 2016-11-30
    Description: A general method for simulating aerosol size distribution dynamics is developed. The method, based on dividing the particle size domain into sections and dealing only with one integral quantity in each section (e.g., number, surface area, or volume), has the advantages that the integral quantity is conserved within the computational domain and coagulations between all particle sizes are properly accounted for. To demonstrate the simplicity and accuracy of the method for a practical problem, the evolution of a power plant plume aerosol undergoing coagulation is simulated.
    Type: Article , PeerReviewed
    Format: text
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