Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change
Droplet freezing not only is of fundamental interest but also plays an important role in numerous natural and industrial processes. However, it is challenging to numerically simulate the droplet freezing process due to its involving a complex three-phase system with dynamic phase change and heat tra...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/146560 |
| _version_ | 1826114166383968256 |
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| author | Zhang, Chaoyang Zhang, Hui Fang, Wen-Zhen Zhao, Yugang Yang, Chun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Zhang, Chaoyang Zhang, Hui Fang, Wen-Zhen Zhao, Yugang Yang, Chun |
| author_sort | Zhang, Chaoyang |
| collection | NTU |
| description | Droplet freezing not only is of fundamental interest but also plays an important role in numerous natural and industrial processes. However, it is challenging to numerically simulate the droplet freezing process due to its involving a complex three-phase system with dynamic phase change and heat transfer. Here we propose an axisymmetric lattice Boltzmann (LB) model to simulate the freezing process of a sessile water droplet with consideration of droplet volume expansion. Combined with the multiphase flow LB model and the enthalpy thermal LB model, our proposed approach is applied to simulate the sessile water droplet freezing on both hydrophilic and hydrophobic surfaces at a fixed subcooled temperature. Through comparison with the experimental counterpart, the comparison results show that our axisymmetric LB model can satisfactorily describe such sessile droplet freezing processes. Moreover, we use both LB simulations and analytical models to study the effects of contact angle and volume expansion on the freezing time and the cone shape formed on the top of frozen droplets. The analytical models are obtained based on heat transfer and geometric analyses. Additionally, we show analytically and numerically that the freezing front-to-interface angle keeps nearly constant (smaller than 90°). |
| first_indexed | 2024-10-01T03:35:02Z |
| format | Journal Article |
| id | ntu-10356/146560 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:35:02Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1465602021-03-01T06:10:02Z Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change Zhang, Chaoyang Zhang, Hui Fang, Wen-Zhen Zhao, Yugang Yang, Chun School of Mechanical and Aerospace Engineering Science::Physics Lattice-Boltzmann Methods Fluid Dynamics Droplet freezing not only is of fundamental interest but also plays an important role in numerous natural and industrial processes. However, it is challenging to numerically simulate the droplet freezing process due to its involving a complex three-phase system with dynamic phase change and heat transfer. Here we propose an axisymmetric lattice Boltzmann (LB) model to simulate the freezing process of a sessile water droplet with consideration of droplet volume expansion. Combined with the multiphase flow LB model and the enthalpy thermal LB model, our proposed approach is applied to simulate the sessile water droplet freezing on both hydrophilic and hydrophobic surfaces at a fixed subcooled temperature. Through comparison with the experimental counterpart, the comparison results show that our axisymmetric LB model can satisfactorily describe such sessile droplet freezing processes. Moreover, we use both LB simulations and analytical models to study the effects of contact angle and volume expansion on the freezing time and the cone shape formed on the top of frozen droplets. The analytical models are obtained based on heat transfer and geometric analyses. Additionally, we show analytically and numerically that the freezing front-to-interface angle keeps nearly constant (smaller than 90°). Ministry of Education (MOE) Published version This work was supported by the Ministry of Singapore via Tier 2 Academic Research Fund (MOE2016-T2-1-114). 2021-03-01T06:10:02Z 2021-03-01T06:10:02Z 2020 Journal Article Zhang, C., Zhang, H., Fang, W.-Z., Zhao, Y., & Yang, C. (2020). Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change. Physical Review E, 101(2), 023314-. doi:10.1103/physreve.101.023314 2470-0045 https://hdl.handle.net/10356/146560 10.1103/PhysRevE.101.023314 32168660 2-s2.0-85082095836 2 101 en MOE2016-T2-1-114 Physical Review E © 2020 American Physical Society (APS). All rights reserved. This paper was published in Physical Review E and is made available with permission of American Physical Society (APS). application/pdf |
| spellingShingle | Science::Physics Lattice-Boltzmann Methods Fluid Dynamics Zhang, Chaoyang Zhang, Hui Fang, Wen-Zhen Zhao, Yugang Yang, Chun Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| title | Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| title_full | Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| title_fullStr | Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| title_full_unstemmed | Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| title_short | Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| title_sort | axisymmetric lattice boltzmann model for simulating the freezing process of a sessile water droplet with volume change |
| topic | Science::Physics Lattice-Boltzmann Methods Fluid Dynamics |
| url | https://hdl.handle.net/10356/146560 |
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