Shape and temperature dependence on the directional velocity change in a freezing water droplet
Freezing of water droplets are of interest in areas such as de-icing and anti-icing of wind turbine blades, aircrafts and cars. On part of the ice build-up that has been less studied is the internal flow in water droplets and how it affects the freezing process. In this paper the aim is to investiga...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
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| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202723002343 |
| _version_ | 1797401640533229568 |
|---|---|
| author | Erik Fagerström Anna-Lena Ljung |
| author_facet | Erik Fagerström Anna-Lena Ljung |
| author_sort | Erik Fagerström |
| collection | DOAJ |
| description | Freezing of water droplets are of interest in areas such as de-icing and anti-icing of wind turbine blades, aircrafts and cars. On part of the ice build-up that has been less studied is the internal flow in water droplets and how it affects the freezing process. In this paper the aim is to investigate how the contact angle, substrate composition and temperature influences the internal flow. Particle Image Velocimetry (PIV) is used to determine the magnitude and direction of the internal flow, with specific emphasis on directional changes. Results show that a larger contact angle will increase the internal velocity, freezing time and time until the directional change. Cooler substrate temperature increase the internal velocity while reducing the freezing time, but the dependence on the time until the directional change is not as pronounced. The result thus indicate differences in the driving forces between freezing time, internal velocity and directional velocity change. Difference due to substrate composition, i.e. mixture of ice and metal versus only metal is furthermore compared. |
| first_indexed | 2024-03-09T02:12:59Z |
| format | Article |
| id | doaj.art-b3a91bc31140453591ab5b927183c9c3 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-03-09T02:12:59Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-b3a91bc31140453591ab5b927183c9c32023-12-07T05:31:02ZengElsevierInternational Journal of Thermofluids2666-20272023-11-0120100519Shape and temperature dependence on the directional velocity change in a freezing water dropletErik Fagerström0Anna-Lena Ljung1Corresponding author.; Division of Fluid Mechanics, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, 97187, SwedenDivision of Fluid Mechanics, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, 97187, SwedenFreezing of water droplets are of interest in areas such as de-icing and anti-icing of wind turbine blades, aircrafts and cars. On part of the ice build-up that has been less studied is the internal flow in water droplets and how it affects the freezing process. In this paper the aim is to investigate how the contact angle, substrate composition and temperature influences the internal flow. Particle Image Velocimetry (PIV) is used to determine the magnitude and direction of the internal flow, with specific emphasis on directional changes. Results show that a larger contact angle will increase the internal velocity, freezing time and time until the directional change. Cooler substrate temperature increase the internal velocity while reducing the freezing time, but the dependence on the time until the directional change is not as pronounced. The result thus indicate differences in the driving forces between freezing time, internal velocity and directional velocity change. Difference due to substrate composition, i.e. mixture of ice and metal versus only metal is furthermore compared.http://www.sciencedirect.com/science/article/pii/S2666202723002343Internal flowWater dropletFreezingPIVDirectional change |
| spellingShingle | Erik Fagerström Anna-Lena Ljung Shape and temperature dependence on the directional velocity change in a freezing water droplet International Journal of Thermofluids Internal flow Water droplet Freezing PIV Directional change |
| title | Shape and temperature dependence on the directional velocity change in a freezing water droplet |
| title_full | Shape and temperature dependence on the directional velocity change in a freezing water droplet |
| title_fullStr | Shape and temperature dependence on the directional velocity change in a freezing water droplet |
| title_full_unstemmed | Shape and temperature dependence on the directional velocity change in a freezing water droplet |
| title_short | Shape and temperature dependence on the directional velocity change in a freezing water droplet |
| title_sort | shape and temperature dependence on the directional velocity change in a freezing water droplet |
| topic | Internal flow Water droplet Freezing PIV Directional change |
| url | http://www.sciencedirect.com/science/article/pii/S2666202723002343 |
| work_keys_str_mv | AT erikfagerstrom shapeandtemperaturedependenceonthedirectionalvelocitychangeinafreezingwaterdroplet AT annalenaljung shapeandtemperaturedependenceonthedirectionalvelocitychangeinafreezingwaterdroplet |