The effect of interfacial properties and liquid flow on the stability of powder islands
This study aims at understanding the interplay between the interfacial properties of the powder grains and the characteristics of the liquid flow used to disperse them, in order to obtain an effective dispersion of a powder in a liquid, avoiding air entrainment. The dispersion of grain “rafts” and p...
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ftusurrey:oai:epubs.surrey.ac.uk:842206 2023-05-15T18:03:16+02:00 The effect of interfacial properties and liquid flow on the stability of powder islands Ong, Xin Yi Taylor, Spencer Ramaioli, Marco 2017-06-30 text http://epubs.surrey.ac.uk/842206/1/PG2017_XinYiOng%20%281%29.pdf https://doi.org/10.1051/epjconf/201714009006 en eng EDP Sciences http://epubs.surrey.ac.uk/842206/ 10.1051/epjconf/201714009006 http://epubs.surrey.ac.uk/842206/1/PG2017_XinYiOng%20%281%29.pdf Ong, Xin Yi, Taylor, Spencer and Ramaioli, Marco (2017) The effect of interfacial properties and liquid flow on the stability of powder islands In: Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media, 03-07 Jul 2017, Montpellier, France. doi:10.1051/epjconf/201714009006 Conference or Workshop Item PeerReviewed 2017 ftusurrey https://doi.org/10.1051/epjconf/201714009006 2019-12-14T07:42:57Z This study aims at understanding the interplay between the interfacial properties of the powder grains and the characteristics of the liquid flow used to disperse them, in order to obtain an effective dispersion of a powder in a liquid, avoiding air entrainment. The dispersion of grain “rafts” and powder islands “stacks” was investigated both on a static and on a moving air-liquid interface. Powder wicking prevents the formation of a powder island when the grain contact angle is below a critical contact angle. Above the critical contact angle, a powder island forms and grows to a critical depth that depends on grain radius and contact angle. Imposing a flow on the air-liquid interface can either promote water impregnation, reducing the depth of the powder island or destabilise the whole island. In the latter case, the island sinks, forming a heterogeneous powder structure that is wet outside and dry inside. Conference Object Powder Island University of Surrey, Guildford: Surrey Scholarship Online. Powder Island ENVELOPE(-68.759,-68.759,-69.525,-69.525) EPJ Web of Conferences 140 09006 |
institution |
Open Polar |
collection |
University of Surrey, Guildford: Surrey Scholarship Online. |
op_collection_id |
ftusurrey |
language |
English |
description |
This study aims at understanding the interplay between the interfacial properties of the powder grains and the characteristics of the liquid flow used to disperse them, in order to obtain an effective dispersion of a powder in a liquid, avoiding air entrainment. The dispersion of grain “rafts” and powder islands “stacks” was investigated both on a static and on a moving air-liquid interface. Powder wicking prevents the formation of a powder island when the grain contact angle is below a critical contact angle. Above the critical contact angle, a powder island forms and grows to a critical depth that depends on grain radius and contact angle. Imposing a flow on the air-liquid interface can either promote water impregnation, reducing the depth of the powder island or destabilise the whole island. In the latter case, the island sinks, forming a heterogeneous powder structure that is wet outside and dry inside. |
format |
Conference Object |
author |
Ong, Xin Yi Taylor, Spencer Ramaioli, Marco |
spellingShingle |
Ong, Xin Yi Taylor, Spencer Ramaioli, Marco The effect of interfacial properties and liquid flow on the stability of powder islands |
author_facet |
Ong, Xin Yi Taylor, Spencer Ramaioli, Marco |
author_sort |
Ong, Xin Yi |
title |
The effect of interfacial properties and liquid flow on the stability of powder islands |
title_short |
The effect of interfacial properties and liquid flow on the stability of powder islands |
title_full |
The effect of interfacial properties and liquid flow on the stability of powder islands |
title_fullStr |
The effect of interfacial properties and liquid flow on the stability of powder islands |
title_full_unstemmed |
The effect of interfacial properties and liquid flow on the stability of powder islands |
title_sort |
effect of interfacial properties and liquid flow on the stability of powder islands |
publisher |
EDP Sciences |
publishDate |
2017 |
url |
http://epubs.surrey.ac.uk/842206/1/PG2017_XinYiOng%20%281%29.pdf https://doi.org/10.1051/epjconf/201714009006 |
long_lat |
ENVELOPE(-68.759,-68.759,-69.525,-69.525) |
geographic |
Powder Island |
geographic_facet |
Powder Island |
genre |
Powder Island |
genre_facet |
Powder Island |
op_relation |
http://epubs.surrey.ac.uk/842206/ 10.1051/epjconf/201714009006 http://epubs.surrey.ac.uk/842206/1/PG2017_XinYiOng%20%281%29.pdf Ong, Xin Yi, Taylor, Spencer and Ramaioli, Marco (2017) The effect of interfacial properties and liquid flow on the stability of powder islands In: Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media, 03-07 Jul 2017, Montpellier, France. doi:10.1051/epjconf/201714009006 |
op_doi |
https://doi.org/10.1051/epjconf/201714009006 |
container_title |
EPJ Web of Conferences |
container_volume |
140 |
container_start_page |
09006 |
_version_ |
1766174095770124288 |