Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/111984
DC Field | Value | Language |
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dc.contributor.author | Rosa, Nuno | - |
dc.contributor.author | Soares, Nelson | - |
dc.contributor.author | Costa, José | - |
dc.contributor.author | Lopes, António Gameiro | - |
dc.date.accessioned | 2024-01-18T09:20:34Z | - |
dc.date.available | 2024-01-18T09:20:34Z | - |
dc.date.issued | 2023 | - |
dc.identifier.issn | 2411-5134 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/111984 | - |
dc.description.abstract | This paper presents a numerical model for simulating melting and solidification driven by natural convection, and validates it against a previous experiment. The experiment involved filling a rectangular aluminum enclosure with RT28HC Phase Change Material (PCM) to 95% of its capacity. To investigate the thermal behavior of the PCM during phase change, the enclosure underwent independent heating and cooling procedures. The simulation was conducted using ANSYS CFX®, and the additional heat source (AHS) method was implemented in conjunction with the Boussinesq approximation to account for the latent heat during melting and solidification driven by natural convection. This allowed the calculation of temperature fields, the melted fraction, and fluid dynamics during phase change. The momentum equations were modified to include a source term that accounted for a gradual decrease in fluid velocity as the PCM transitions from solid to liquid. To account for density variation, an artificial specific heat curve was implemented based on the assumption that the product of density and specific heat remains constant during phase change. The proposed numerical model achieved good agreement with the experimental data, with an average root mean square error of 2.6% and 3.7% for temperature profiles during charging and discharging simulations, respectively. This model can be easily implemented in ANSYS CFX® and accurately predicts charging and discharging kinetics, as well as stored/released energy, without any numerical convergence issues. | pt |
dc.language.iso | eng | pt |
dc.publisher | MDPI | pt |
dc.relation | UIDB/50022/2020 | pt |
dc.relation | FCT “AdsorSeason—Long-term adsorption solar thermal energy storage”, ref. 2022.03339.PTDC | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.subject | phase change material (PCM) | pt |
dc.subject | additional heat source method (AHS) | pt |
dc.subject | natural convection | pt |
dc.subject | computational fluid dynamics (CFD) | pt |
dc.title | Validation of a Simplified Numerical Model for Predicting Solid–Liquid Phase Change with Natural Convection in Ansys CFX | pt |
dc.type | article | - |
degois.publication.firstPage | 93 | pt |
degois.publication.issue | 4 | pt |
degois.publication.title | Inventions | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.3390/inventions8040093 | pt |
degois.publication.volume | 8 | pt |
dc.date.embargo | 2023-01-01 | * |
uc.date.periodoEmbargo | 0 | pt |
item.openairetype | article | - |
item.fulltext | Com Texto completo | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.project.grantno | Associate Laboratory of Energy, Transports and Aeronautics | - |
crisitem.author.researchunit | ADAI - Association for the Development of Industrial Aerodynamics | - |
crisitem.author.researchunit | LAETA - Associated Laboratory for Energy, Transports and Aeronautics | - |
crisitem.author.orcid | 0000-0002-1314-165X | - |
crisitem.author.orcid | 0000-0002-6852-5394 | - |
Appears in Collections: | FCTUC Eng.Mecânica - Artigos em Revistas Nacionais |
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File | Description | Size | Format | |
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Validation-of-a-Simplified-Numerical-Model-for-Predicting-SolidLiquid-Phase-Change-with-Natural-Convection-in-Ansys-CFXInventions.pdf | 7.42 MB | Adobe PDF | View/Open |
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This item is licensed under a Creative Commons License