Condensed Matter > Statistical Mechanics
[Submitted on 26 Apr 2016 (v1), last revised 8 Sep 2016 (this version, v2)]
Title:Photophoresis on particles hotter/colder than the ambient gas in the free molecular flow
View PDFAbstract:Aerosol particles experience significant photophoretic forces at low pressure. Previous work assumed the average particle temperature to be very close to the gas temperature. This might not always be the case. If the particle temperature or the thermal radiation field differs significantly from the gas temperature (optically thin gases), given approximations overestimate the photophoretic force by an order of magnitude on average with maximum errors up to more than three magnitudes. We therefore developed a new general approximation which on average only differs by 1 % from the true value.
Submission history
From: C. Loesche [view email][v1] Tue, 26 Apr 2016 11:38:47 UTC (845 KB)
[v2] Thu, 8 Sep 2016 05:46:00 UTC (816 KB)
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