Lead aerosol Brownian collision rates at normal and elevated temperature: theory

Journal Article · Sat May 01 04:00:00 EDT 1982 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(82)90383-6· OSTI ID:6058657

Marlow, W H

Lifshitz-van der Waals theory including retardation is used to compute the attractive potential between pairs of lead spheres of 1-, 10-nm, and 1- and 10-nm radii at 293, 840, and 1059/sup 0/K and the energies are plotted as functions of particle surface separations. These curves are then used to compute the particle collision rates using a recently published generalization of Fuchs' interpolation formula which includes the effect of particle interaction potentials. The results indicate a size-dependent enhancement of particle collision rates due to van der Waals attraction. Collision rates are shown to bracket the rate measured by Graham and Homer whose data fit a free-molecular self-preserving distribution. The effect of temperature upon collision rates is to decrease them as temperature rises despite a corresponding increase in the attractive interaction energy of the particles.

• Research Organization: Brookhaven National Lab., Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6058657
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 87:1; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
BROWNIAN MOVEMENT
COLLISIONS
COLLOIDS
DATA
DISPERSIONS
ELEMENTS
HIGH TEMPERATURE
INFORMATION
LEAD
MEDIUM TEMPERATURE
METALS
NUMERICAL DATA
PARTICLE SIZE
SIZE
SOLS
TEMPERATURE EFFECTS
THEORETICAL DATA
VAN DER WAALS FORCES
VERY HIGH TEMPERATURE