Simulations of melting in fluid-filled packed media due to forced convection with higher temperature
An original CFD-DEM method, named as CD-MELT, is developed to model the isothermal melting of a packed bed subjected to a forced convection with higher temperature. The formulation of CD-MELT allows a high degree of representation of the melting process. With specific melting parameters, the particl...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/155834 |
| _version_ | 1824455980998459392 |
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| author | Soon, Genevieve Zhang, Hui Yang, Chun Law, Adrian Wing-Keung |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Soon, Genevieve Zhang, Hui Yang, Chun Law, Adrian Wing-Keung |
| author_sort | Soon, Genevieve |
| collection | NTU |
| description | An original CFD-DEM method, named as CD-MELT, is developed to model the isothermal melting of a packed bed subjected to a forced convection with higher temperature. The formulation of CD-MELT allows a high degree of representation of the melting process. With specific melting parameters, the particles in the packed bed undergo mass, diameter and temperature change individually, and the packed bed is reconfigured afterward through particles collision and contact. The phase changes are accounted for via source terms using a mass loss fraction, ranging from 0 (initial mass) to 1 (complete melting), which is introduced for the first time and differs from other existing models. The CD-MELT's predictions are compared with the results from an earlier experimental study on the melting of a single ice sphere as well as a packed bed of ice spheres due to a forced convection of warm water. The comparison is found to be satisfactory despite the use of a coarse mesh, and the computation run is stable despite the varying mesh-particle size ratio. Finally, the effects of spring constant and restitution coefficient in the particle collision model are further investigated for the case of a non-floating packed bed under forced convection. Recommendations are made on how their suitable values can be determined in future melting studies. |
| first_indexed | 2025-02-19T03:46:50Z |
| format | Journal Article |
| id | ntu-10356/155834 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:46:50Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1558342022-03-26T20:11:31Z Simulations of melting in fluid-filled packed media due to forced convection with higher temperature Soon, Genevieve Zhang, Hui Yang, Chun Law, Adrian Wing-Keung School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) School of Mechanical and Aerospace Engineering Nanyang Environment and Water Research Institute Environmental Process Modelling Centre Engineering::Civil engineering Discrete Element Method Computational Fluid Dynamics An original CFD-DEM method, named as CD-MELT, is developed to model the isothermal melting of a packed bed subjected to a forced convection with higher temperature. The formulation of CD-MELT allows a high degree of representation of the melting process. With specific melting parameters, the particles in the packed bed undergo mass, diameter and temperature change individually, and the packed bed is reconfigured afterward through particles collision and contact. The phase changes are accounted for via source terms using a mass loss fraction, ranging from 0 (initial mass) to 1 (complete melting), which is introduced for the first time and differs from other existing models. The CD-MELT's predictions are compared with the results from an earlier experimental study on the melting of a single ice sphere as well as a packed bed of ice spheres due to a forced convection of warm water. The comparison is found to be satisfactory despite the use of a coarse mesh, and the computation run is stable despite the varying mesh-particle size ratio. Finally, the effects of spring constant and restitution coefficient in the particle collision model are further investigated for the case of a non-floating packed bed under forced convection. Recommendations are made on how their suitable values can be determined in future melting studies. Submitted/Accepted version 2022-03-23T05:47:53Z 2022-03-23T05:47:53Z 2021 Journal Article Soon, G., Zhang, H., Yang, C. & Law, A. W. (2021). Simulations of melting in fluid-filled packed media due to forced convection with higher temperature. International Journal of Heat and Mass Transfer, 175, 121358-. https://dx.doi.org/10.1016/j.ijheatmasstransfer.2021.121358 0017-9310 https://hdl.handle.net/10356/155834 10.1016/j.ijheatmasstransfer.2021.121358 2-s2.0-85105250672 175 121358 en International Journal of Heat and Mass Transfer © 2021 Elsevier Ltd. All rights reserved. This paper was published in International Journal of Heat and Mass Transfer and is made available with permission of Elsevier Ltd. application/pdf |
| spellingShingle | Engineering::Civil engineering Discrete Element Method Computational Fluid Dynamics Soon, Genevieve Zhang, Hui Yang, Chun Law, Adrian Wing-Keung Simulations of melting in fluid-filled packed media due to forced convection with higher temperature |
| title | Simulations of melting in fluid-filled packed media due to forced convection with higher temperature |
| title_full | Simulations of melting in fluid-filled packed media due to forced convection with higher temperature |
| title_fullStr | Simulations of melting in fluid-filled packed media due to forced convection with higher temperature |
| title_full_unstemmed | Simulations of melting in fluid-filled packed media due to forced convection with higher temperature |
| title_short | Simulations of melting in fluid-filled packed media due to forced convection with higher temperature |
| title_sort | simulations of melting in fluid filled packed media due to forced convection with higher temperature |
| topic | Engineering::Civil engineering Discrete Element Method Computational Fluid Dynamics |
| url | https://hdl.handle.net/10356/155834 |
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