Articles producció científica> Química Física i Inorgànica

Three-dimensional effects during thermocapillary-driven melting of PCMs in cuboidal containers in microgravity

  • Identification data

    Identifier: imarina:9333810
    Authors:
    Seta, BSánchez, PSDubert, DMassons, JGavaldà, JPorter, JBou-Ali, MMRuiz, XShevtsova, V
    Abstract:
    The melting of a phase change material (PCM) in a cuboidal domain under microgravity conditions is investigated numerically. The upper surface of the PCM is free (in contact with air, for example) and variations in its surface tension drive thermocapillary convection in the liquid phase, which significantly enhances heat transfer and accelerates melting. Furthermore, the change in liquid fraction during melting is associated with transitions among various modes of thermocapillary dynamics, including an oscillatory instability to hydrothermal waves. While the characteristics of PCM melting and thermocapillary dynamics have previously been investigated in this system using a two-dimensional model, the current work examines the important question of transverse dynamics and their effect on the melting process. Careful quantitative comparisons are made between the three- and two-dimensional models in terms of melting times, solid/liquid interface evolution, thermal fields, and spectrograms. The results show that transverse modes are often, but not always, reflection symmetric about the midplane and that their influence on melting and PCM performance is relatively minor in most cases. Thus, two-dimensional models may be used to reduce computational costs while still providing a reasonable approximation of the melting process for high Prandtl number materials, especially when compared to the midplane of the full cuboidal domain.
  • Others:

    Author, as appears in the article.: Seta, B; Sánchez, PS; Dubert, D; Massons, J; Gavaldà, J; Porter, J; Bou-Ali, MM; Ruiz, X; Shevtsova, V
    Department: Química Física i Inorgànica
    URV's Author/s: Dubert, Diana Cristina / Gavaldà Martínez, Josefa / Masons Bosch, Jaime
    Keywords: Thermocapillary effect Phase-change materials Phase change materials Microgravity Melting thermocapillary effect solidification reduction performance number nepcm microgravity melting heat convection
    Abstract: The melting of a phase change material (PCM) in a cuboidal domain under microgravity conditions is investigated numerically. The upper surface of the PCM is free (in contact with air, for example) and variations in its surface tension drive thermocapillary convection in the liquid phase, which significantly enhances heat transfer and accelerates melting. Furthermore, the change in liquid fraction during melting is associated with transitions among various modes of thermocapillary dynamics, including an oscillatory instability to hydrothermal waves. While the characteristics of PCM melting and thermocapillary dynamics have previously been investigated in this system using a two-dimensional model, the current work examines the important question of transverse dynamics and their effect on the melting process. Careful quantitative comparisons are made between the three- and two-dimensional models in terms of melting times, solid/liquid interface evolution, thermal fields, and spectrograms. The results show that transverse modes are often, but not always, reflection symmetric about the midplane and that their influence on melting and PCM performance is relatively minor in most cases. Thus, two-dimensional models may be used to reduce computational costs while still providing a reasonable approximation of the melting process for high Prandtl number materials, especially when compared to the midplane of the full cuboidal domain.
    Thematic Areas: Thermodynamics Química Mechanics Interdisciplinar General chemical engineering Engenharias iv Engenharias iii Engenharias ii Condensed matter physics Ciências biológicas i Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Atomic and molecular physics, and optics Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: dianacristina.dubert@urv.cat fina.gavalda@urv.cat jaume.masons@urv.cat
    Author identifier: 0000-0002-7308-5872 0000-0001-7881-4192 0000-0003-4325-6084
    Record's date: 2024-05-11
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S0735193323005870
    Papper original source: International Communications In Heat And Mass Transfer. 150
    APA: Seta, B; Sánchez, PS; Dubert, D; Massons, J; Gavaldà, J; Porter, J; Bou-Ali, MM; Ruiz, X; Shevtsova, V (2024). Three-dimensional effects during thermocapillary-driven melting of PCMs in cuboidal containers in microgravity. International Communications In Heat And Mass Transfer, 150(), -. DOI: 10.1016/j.icheatmasstransfer.2023.107198
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1016/j.icheatmasstransfer.2023.107198
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2024
    Publication Type: Journal Publications
  • Keywords:

    Atomic and Molecular Physics, and Optics,Chemical Engineering (Miscellaneous),Condensed Matter Physics,Mechanics,Thermodynamics
    Thermocapillary effect
    Phase-change materials
    Phase change materials
    Microgravity
    Melting
    thermocapillary effect
    solidification
    reduction
    performance
    number
    nepcm
    microgravity
    melting
    heat
    convection
    Thermodynamics
    Química
    Mechanics
    Interdisciplinar
    General chemical engineering
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Condensed matter physics
    Ciências biológicas i
    Chemical engineering (miscellaneous)
    Chemical engineering (all)
    Biotecnología
    Atomic and molecular physics, and optics
    Astronomia / física
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