Derivation of aerosol collision rates for singular attractive contact potentials

Journal Article · Mon Dec 15 04:00:00 EST 1980 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.440126· OSTI ID:6756675

Marlow, W H

A rigorous derivation is given of the collision rate for spherical aerosol particles in the free-molecular regime interacting via an attractive potential which diverges at particle contact. The Lifshitz--van der Waals and electrical image potentials are two examples of such particle interactions that play important roles in aerosol dynamics. The method employed in the derivation of this extended free-molecular collision rate is then used to derive an expression for transition regime collision rates by means of Fuchs' method. This is the first time that the influence of a particle interaction potential upon the collision rate has been incorporated into the Fuchs formula. Results of computations employing the extended free-molecular formula derived here are compared with published data and the computations used in their interpretation. By utilizing the same interaction potentials as in those interpretative computations, the corrected free-molecular formula is shown to improve the data fits.

• Research Organization: Environmental Chemistry Division, Department of Energy and Environment, Brookhaven National Laboratory, Upton, New York 11973
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6756675
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 73:12; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AEROSOLS
COLLISIONS
COLLOIDS
DISPERSIONS
INTERMOLECULAR FORCES
KINETICS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
SOLS
VAN DER WAALS FORCES