Freezing of water droplets colliding with kaolinite particles
Contact freezing of single supercooled water droplets colliding with kaolinite dust particles has been investigated. The experiments were performed with droplets levitated in an electrodynamic balance at temperatures from 240 to 268 K. Under relatively dry conditions (when no water vapor was added)...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2009-07-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/9/4295/2009/acp-9-4295-2009.pdf |
| _version_ | 1818525205837905920 |
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| author | E. A. Svensson C. Delval P. von Hessberg M. S. Johnson J. B. C. Pettersson |
| author_facet | E. A. Svensson C. Delval P. von Hessberg M. S. Johnson J. B. C. Pettersson |
| author_sort | E. A. Svensson |
| collection | DOAJ |
| description | Contact freezing of single supercooled water droplets colliding with kaolinite dust particles has been investigated. The experiments were performed with droplets levitated in an electrodynamic balance at temperatures from 240 to 268 K. Under relatively dry conditions (when no water vapor was added) freezing was observed to occur below 249 K, while a freezing threshold of 267 K was observed when water vapor was added to the air in the chamber. <br><br> The effect of relative humidity is attributed to an influence on the contact freezing process for the kaolinite-water droplet system, and it is not related to the lifetime of the droplets in the electrodynamic balance. Freezing probabilities per collision were derived assuming that collisions at the lowest temperature employed had a probability of unity. Mechanisms for contact freezing are briefly discussed. |
| first_indexed | 2024-12-11T06:06:30Z |
| format | Article |
| id | doaj.art-e1f4506966db42d291228c83251a368d |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-11T06:06:30Z |
| publishDate | 2009-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-e1f4506966db42d291228c83251a368d2022-12-22T01:18:17ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242009-07-0191342954300Freezing of water droplets colliding with kaolinite particlesE. A. SvenssonC. DelvalP. von HessbergM. S. JohnsonJ. B. C. PetterssonContact freezing of single supercooled water droplets colliding with kaolinite dust particles has been investigated. The experiments were performed with droplets levitated in an electrodynamic balance at temperatures from 240 to 268 K. Under relatively dry conditions (when no water vapor was added) freezing was observed to occur below 249 K, while a freezing threshold of 267 K was observed when water vapor was added to the air in the chamber. <br><br> The effect of relative humidity is attributed to an influence on the contact freezing process for the kaolinite-water droplet system, and it is not related to the lifetime of the droplets in the electrodynamic balance. Freezing probabilities per collision were derived assuming that collisions at the lowest temperature employed had a probability of unity. Mechanisms for contact freezing are briefly discussed.http://www.atmos-chem-phys.net/9/4295/2009/acp-9-4295-2009.pdf |
| spellingShingle | E. A. Svensson C. Delval P. von Hessberg M. S. Johnson J. B. C. Pettersson Freezing of water droplets colliding with kaolinite particles Atmospheric Chemistry and Physics |
| title | Freezing of water droplets colliding with kaolinite particles |
| title_full | Freezing of water droplets colliding with kaolinite particles |
| title_fullStr | Freezing of water droplets colliding with kaolinite particles |
| title_full_unstemmed | Freezing of water droplets colliding with kaolinite particles |
| title_short | Freezing of water droplets colliding with kaolinite particles |
| title_sort | freezing of water droplets colliding with kaolinite particles |
| url | http://www.atmos-chem-phys.net/9/4295/2009/acp-9-4295-2009.pdf |
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