Articles producció científica> Química Física i Inorgànica

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

  • Dades identificatives

    Identificador: imarina:9333810
    Autors:
    Seta, BSánchez, PSDubert, DMassons, JGavaldà, JPorter, JBou-Ali, MMRuiz, XShevtsova, V
    Resum:
    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.
  • Altres:

    Autor segons l'article: Seta, B; Sánchez, PS; Dubert, D; Massons, J; Gavaldà, J; Porter, J; Bou-Ali, MM; Ruiz, X; Shevtsova, V
    Departament: Química Física i Inorgànica
    Autor/s de la URV: Dubert, Diana Cristina / Gavaldà Martínez, Josefa / Masons Bosch, Jaime
    Paraules clau: Thermocapillary effect Phase-change materials Phase change materials Microgravity Melting thermocapillary effect solidification reduction performance number nepcm microgravity melting heat convection
    Resum: 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.
    Àrees temàtiques: 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
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: dianacristina.dubert@urv.cat fina.gavalda@urv.cat jaume.masons@urv.cat
    Identificador de l'autor: 0000-0002-7308-5872 0000-0001-7881-4192 0000-0003-4325-6084
    Data d'alta del registre: 2024-05-11
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0735193323005870
    Referència a l'article segons font original: International Communications In Heat And Mass Transfer. 150
    Referència de l'ítem segons les normes 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
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.1016/j.icheatmasstransfer.2023.107198
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2024
    Tipus de publicació: Journal Publications
  • Paraules clau:

    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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