Breakup of levitated frost particles

Breakup of levitated frost particles

We have studied the sublimation and breakup of single 100–200 μm frost particles levitated electrically at temperatures in the range −2°C to −30°C. Breakup rates were largely independent of temperature and humidity in this range but strongly dependent on particle shape. Irregular particles of high a...

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Veröffentlicht in:Journal of Geophysical Research, Washington, DC Washington, DC, 1998-06, Vol.103 (D12), p.13763-13775
Hauptverfasser: Bacon, Neil J., Swanson, Brian D., Baker, Marcia B., Davis, E. James
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Sprache:eng
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Cloud physics
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
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container_end_page 13775
container_issue D12
container_start_page 13763
container_title Journal of Geophysical Research, Washington, DC
container_volume 103
creator Bacon, Neil J.
Swanson, Brian D.
Baker, Marcia B.
Davis, E. James
description We have studied the sublimation and breakup of single 100–200 μm frost particles levitated electrically at temperatures in the range −2°C to −30°C. Breakup rates were largely independent of temperature and humidity in this range but strongly dependent on particle shape. Irregular particles of high aspect ratio were most likely to break up. Sublimation (evaporation) was accompanied by an increasing aspect ratio. A linearized sublimation model, presented in the appendix, accounts for the observation that thin neck regions were not subject to enhanced sublimation rates. Estimates of the forces involved in breakup suggest that the breaking strength of these frost particles is considerably less than that of bulk ice. We discuss possible implications of our results for ice particle multiplication in clouds.
doi_str_mv 10.1029/98JD01162
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source Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; Alma/SFX Local Collection
subjects Cloud physics
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
title Breakup of levitated frost particles
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