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Three-phase solidification of a liquid compound droplet on a curved surface

A compound droplet solidifying on a cold curved surface in a gaseous environment is numerically studied by an axisymmetric three-phase front tracking method. The compound droplet containing an inner core of gas is initially assumed to be part of a sphere, and the curved surface is maintained at temp...

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Main Author: Truong V. Vu
Format: Bài trích
Language:English
Published: International Journal of Heat and Mass Transfer 2021
Subjects:
Compound droplet
Solidification
Online Access:https://www.sciencedirect.com/science/article/abs/pii/S0017931021009868?via%3Dihub#!
https://dlib.phenikaa-uni.edu.vn/handle/PNK/3294
https://doi.org/10.1016/j.ijheatmasstransfer.2021.121881
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spelling oai:localhost:PNK-32942022-08-17T05:54:45Z Three-phase solidification of a liquid compound droplet on a curved surface Truong V. Vu Compound droplet Solidification A compound droplet solidifying on a cold curved surface in a gaseous environment is numerically studied by an axisymmetric three-phase front tracking method. The compound droplet containing an inner core of gas is initially assumed to be part of a sphere, and the curved surface is maintained at temperature below the solidification point of the shell liquid. The effects of the radius of the cold surface, volume change (in terms of the solid-to-liquid density ratio ρsl), supercooling degree (in terms of the Stefan number St), growth angle ϕgr and shell liquid thickness on the solidified droplet shape, the solidification rate and the solidification times are under consideration. Volume expansion (ρsl < 1.0) induces an apex, and volume shrinkage (ρsl > 1.0) results in a cavity on top of the outer surface while volume change has a minor effect on the inner surface of the solidified droplet. A more convex surface causes the solidification process to finish earlier, whereas a more concave surface prolongs the entire solidification time. However, the mean solidification rate, the tip angle at the droplet top and the additional height are not affected by the radius of the curved surface. The tip angle is also slightly affected by the outer shape of the initial droplet, the shell thickness and St while these parameters strongly affect the rate of solidification. It is found that the completion of solidification around the inner core is not affected by the growth angle, while it takes longer when increasing ρsl, the size of the inner core or decreasing the Stefan number. 2021-10-27T02:05:03Z 2021-10-27T02:05:03Z 2021 Bài trích https://www.sciencedirect.com/science/article/abs/pii/S0017931021009868?via%3Dihub#! https://dlib.phenikaa-uni.edu.vn/handle/PNK/3294 https://doi.org/10.1016/j.ijheatmasstransfer.2021.121881 en International Journal of Heat and Mass Transfer
institution Digital Phenikaa
collection Digital Phenikaa
language English
topic Compound droplet
Solidification
spellingShingle Compound droplet
Solidification
Truong V. Vu
Three-phase solidification of a liquid compound droplet on a curved surface
description A compound droplet solidifying on a cold curved surface in a gaseous environment is numerically studied by an axisymmetric three-phase front tracking method. The compound droplet containing an inner core of gas is initially assumed to be part of a sphere, and the curved surface is maintained at temperature below the solidification point of the shell liquid. The effects of the radius of the cold surface, volume change (in terms of the solid-to-liquid density ratio ρsl), supercooling degree (in terms of the Stefan number St), growth angle ϕgr and shell liquid thickness on the solidified droplet shape, the solidification rate and the solidification times are under consideration. Volume expansion (ρsl < 1.0) induces an apex, and volume shrinkage (ρsl > 1.0) results in a cavity on top of the outer surface while volume change has a minor effect on the inner surface of the solidified droplet. A more convex surface causes the solidification process to finish earlier, whereas a more concave surface prolongs the entire solidification time. However, the mean solidification rate, the tip angle at the droplet top and the additional height are not affected by the radius of the curved surface. The tip angle is also slightly affected by the outer shape of the initial droplet, the shell thickness and St while these parameters strongly affect the rate of solidification. It is found that the completion of solidification around the inner core is not affected by the growth angle, while it takes longer when increasing ρsl, the size of the inner core or decreasing the Stefan number.
format Bài trích
author Truong V. Vu
author_facet Truong V. Vu
author_sort Truong V. Vu
title Three-phase solidification of a liquid compound droplet on a curved surface
title_short Three-phase solidification of a liquid compound droplet on a curved surface
title_full Three-phase solidification of a liquid compound droplet on a curved surface
title_fullStr Three-phase solidification of a liquid compound droplet on a curved surface
title_full_unstemmed Three-phase solidification of a liquid compound droplet on a curved surface
title_sort three-phase solidification of a liquid compound droplet on a curved surface
publisher International Journal of Heat and Mass Transfer
publishDate 2021
url https://www.sciencedirect.com/science/article/abs/pii/S0017931021009868?via%3Dihub#!
https://dlib.phenikaa-uni.edu.vn/handle/PNK/3294
https://doi.org/10.1016/j.ijheatmasstransfer.2021.121881
_version_ 1751856269191282688
score 8.881002

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