Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate
Abstract The probability P that ice embryos, nucleated inside droplets colliding with an ice surface, have crystallographic orientations different from that of the substrate, is correlated with the mean number of droplets which form each crystal in accretions grown in dry regime (substrate temperatu...
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Cambridge University Press (CUP)
1978
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Online Access: | http://dx.doi.org/10.1017/s002214300003392x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300003392X |
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crcambridgeupr:10.1017/s002214300003392x 2024-03-03T08:45:56+00:00 Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate Levi, L. 1978 http://dx.doi.org/10.1017/s002214300003392x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300003392X en eng Cambridge University Press (CUP) Journal of Glaciology volume 21, issue 85, page 705 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1978 crcambridgeupr https://doi.org/10.1017/s002214300003392x 2024-02-08T08:40:37Z Abstract The probability P that ice embryos, nucleated inside droplets colliding with an ice surface, have crystallographic orientations different from that of the substrate, is correlated with the mean number of droplets which form each crystal in accretions grown in dry regime (substrate temperature T s < 0°C). The theory of heterogeneous nucleation is applied to represent the ice embryo nucleation rate and the approximate expression is obtained, where Δ G y * is the nucleation energy for randomly oriented critical embryos. Assuming cap-shaped embryos and taking into account the crystal size in accretions grown at T s = —15°C and air temperatures , it is found that erg The relationship between the value of Δ G y * and those of the crystal-embryo and crystal-melt interfacial free energies is discussed. Finally the dependence of P 0 on the growth conditions and on the ice substrate orientation is analysed, considering the effect of embryo breeding by collision and that of orientation selection, which is responsible for the establishment of preferential orientations in the accretions. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 21 85 705 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Levi, L. Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate |
topic_facet |
Earth-Surface Processes |
description |
Abstract The probability P that ice embryos, nucleated inside droplets colliding with an ice surface, have crystallographic orientations different from that of the substrate, is correlated with the mean number of droplets which form each crystal in accretions grown in dry regime (substrate temperature T s < 0°C). The theory of heterogeneous nucleation is applied to represent the ice embryo nucleation rate and the approximate expression is obtained, where Δ G y * is the nucleation energy for randomly oriented critical embryos. Assuming cap-shaped embryos and taking into account the crystal size in accretions grown at T s = —15°C and air temperatures , it is found that erg The relationship between the value of Δ G y * and those of the crystal-embryo and crystal-melt interfacial free energies is discussed. Finally the dependence of P 0 on the growth conditions and on the ice substrate orientation is analysed, considering the effect of embryo breeding by collision and that of orientation selection, which is responsible for the establishment of preferential orientations in the accretions. |
format |
Article in Journal/Newspaper |
author |
Levi, L. |
author_facet |
Levi, L. |
author_sort |
Levi, L. |
title |
Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate |
title_short |
Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate |
title_full |
Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate |
title_fullStr |
Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate |
title_full_unstemmed |
Application of Nucleation Theory to the Process of Droplet Freezing on an Ice Substrate |
title_sort |
application of nucleation theory to the process of droplet freezing on an ice substrate |
publisher |
Cambridge University Press (CUP) |
publishDate |
1978 |
url |
http://dx.doi.org/10.1017/s002214300003392x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300003392X |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 21, issue 85, page 705 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300003392x |
container_title |
Journal of Glaciology |
container_volume |
21 |
container_issue |
85 |
container_start_page |
705 |
_version_ |
1792501643427708928 |