Photophoresis on particles hotter/colder than the ambient gas in the free molecular flow

Abstract

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.

11 pages

References in corpus (6)

• Protoplanetary Disk Structure With Grain Evolution: the ANDES Model
• Experiments on the Photophoretic Motion of Chondrules and Dust Aggregates - Indications for the Transport of Matter in Protoplanetary Disks
• The implications of particle rotation on the effect of photophoresis
• Thermal and Photophoretic Properties of Dust Mantled Chondrules and Sorting in the Solar Nebula
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Cited by in corpus (8)

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• Selective Aggregation Experiments on Planetesimal Formation and Mercury-Like Planets
• Self-Sustained Recycling in the Inner Dust Ring of Pre-Transitional Disks
• The motion of chondrules and other particles in a protoplanetary disc with temperature fluctuations
• Photophoretic Levitation and Trapping of Dust in the Inner Regions of Protoplanetary Disks