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Solidification of a hollow sessile droplet under forced convection

This study presents a front-tracking-based numerical analysis of the forced convection solidification of a sessile droplet on a cooling surface. The droplet, a hollow (or compound) droplet with an encapsulated gas core, undergoes a liquid-to-solid phase change in its shell. This phase change starts...

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Bibliographic Details
Main Authors: Truong V. Vu, Binh D. Pham, Nang X. Ho, Hung V. Vu
Format: Bài trích
Language:English
Published: AIP Publishing 2022
Subjects:
Science and Technology
Development (NAFOSTED)
Online Access:https://aip.scitation.org/doi/10.1063/5.0084365
https://dlib.phenikaa-uni.edu.vn/handle/PNK/5887
https://doi.org/10.1063/5.0084365
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spelling oai:localhost:PNK-58872022-08-17T05:54:55Z Solidification of a hollow sessile droplet under forced convection Truong V. Vu Binh D. Pham Nang X. Ho Hung V. Vu Science and Technology Development (NAFOSTED) This study presents a front-tracking-based numerical analysis of the forced convection solidification of a sessile droplet on a cooling surface. The droplet, a hollow (or compound) droplet with an encapsulated gas core, undergoes a liquid-to-solid phase change in its shell. This phase change starts from the surface. Meanwhile, the surrounding gas, which is characterized by its Reynolds number Re and temperature, moves toward the droplet parallel to the axis of symmetry. When the temperature of the forced flow is below the solidification value (i.e., cold-forced convection), increasing the strength of the forced flow shortens the solidification process. In contrast, increasing the Re number of a hot-forced convection system prolongs solidification. In other words, an increase in the forced flow temperature causes the entire liquid shell to solidify more slowly. Thinner shells require more time to solidify completely than thicker ones. The forced flow does not influence the formation of an apex at the top of the outer droplet surface. The aforementioned apex results from volume expansion. The effects of other parameters, for example, the capillary number and the morphologies of the droplet and cooling surface, are also determined 2022-07-13T01:59:49Z 2022-07-13T01:59:49Z 2022 Bài trích https://aip.scitation.org/doi/10.1063/5.0084365 https://dlib.phenikaa-uni.edu.vn/handle/PNK/5887 https://doi.org/10.1063/5.0084365 en AIP Publishing
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic Science and Technology
Development (NAFOSTED)
spellingShingle Science and Technology
Development (NAFOSTED)
Truong V. Vu
Binh D. Pham
Nang X. Ho
Hung V. Vu
Solidification of a hollow sessile droplet under forced convection
description This study presents a front-tracking-based numerical analysis of the forced convection solidification of a sessile droplet on a cooling surface. The droplet, a hollow (or compound) droplet with an encapsulated gas core, undergoes a liquid-to-solid phase change in its shell. This phase change starts from the surface. Meanwhile, the surrounding gas, which is characterized by its Reynolds number Re and temperature, moves toward the droplet parallel to the axis of symmetry. When the temperature of the forced flow is below the solidification value (i.e., cold-forced convection), increasing the strength of the forced flow shortens the solidification process. In contrast, increasing the Re number of a hot-forced convection system prolongs solidification. In other words, an increase in the forced flow temperature causes the entire liquid shell to solidify more slowly. Thinner shells require more time to solidify completely than thicker ones. The forced flow does not influence the formation of an apex at the top of the outer droplet surface. The aforementioned apex results from volume expansion. The effects of other parameters, for example, the capillary number and the morphologies of the droplet and cooling surface, are also determined
format Bài trích
author Truong V. Vu
Binh D. Pham
Nang X. Ho
Hung V. Vu
author_facet Truong V. Vu
Binh D. Pham
Nang X. Ho
Hung V. Vu
author_sort Truong V. Vu
title Solidification of a hollow sessile droplet under forced convection
title_short Solidification of a hollow sessile droplet under forced convection
title_full Solidification of a hollow sessile droplet under forced convection
title_fullStr Solidification of a hollow sessile droplet under forced convection
title_full_unstemmed Solidification of a hollow sessile droplet under forced convection
title_sort solidification of a hollow sessile droplet under forced convection
publisher AIP Publishing
publishDate 2022
url https://aip.scitation.org/doi/10.1063/5.0084365
https://dlib.phenikaa-uni.edu.vn/handle/PNK/5887
https://doi.org/10.1063/5.0084365
_version_ 1751856286208622592
score 8.891787

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