On heat conduction between laser-heated nanoparticles and a surrounding gas

Will S (2006)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2006


Publisher: Elsevier

Book Volume: 37

Pages Range: 1696-1716

Journal Issue: 12

DOI: 10.1016/j.jaerosci.2006.06.009


Uncertainties in modeling heat conduction in connection with the application of laser-induced incandescence (LII) to primary particle sizing are discussed. Comparing two models widely used in this context, namely those of Fuchs [(1963). On the stationary charge distribution on aerosol particles in a bipolar ionic atmosphere. Pure and Applied Geophysics 56, 185-193] and McCoy/Cha [(1974). Transport phenomena in the rarefied gas transition regime. Chemical Engineering Science 29, 381-388], it is demonstrated that arising differences may be accounted for by the choice of a proper "effective" thermal accommodation coefficient α. In experiments on a large number of carbon blacks an overally good agreement between LII results and specified values for particle sizes based on electron-microscopy (EM) is obtained with a choice of α = 0.25 (based on the McCoy/Cha-model). As aggregate size is expected to influence heat transfer from primary particles, the experimental data are analyzed by a model for an effective heat transfer surface of fractal aggregates. Based on values for the average number of primary particles per aggregate as derived from photocentrifuge measurements the data yield an extrapolated value for the physical accommodation coefficient for isolated particles of α = 0.43. © 2006 Elsevier Ltd. All rights reserved.

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Will, S. (2006). On heat conduction between laser-heated nanoparticles and a surrounding gas. Journal of Aerosol Science, 37(12), 1696-1716. https://doi.org/10.1016/j.jaerosci.2006.06.009


Will, Stefan. "On heat conduction between laser-heated nanoparticles and a surrounding gas." Journal of Aerosol Science 37.12 (2006): 1696-1716.

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