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Controlled generation of vapor/liquid slug flows by local boiling in microgravity

  • Dades identificatives

    Identificador: imarina:8263166
    Autors:
    Bitlloch PRuiz XRamírez-Piscina LCasademunt J
    Resum:
    © American Institute of Aeronautics and Astronautics Inc.. All rights reserved. We design, construct, and test a device for controlled boiling by means of local vapor bubble formation in a cavity that injects vapor bubbles in a capillary crossflow. The outcome of the device is a regular slug flow of approximately monodisperse bubbles that can be used for a variety of applications. The setup is designed to be independent of gravity level and is tested succesfully both in normal gravity and in microgravity using drop tower experiments. The device is calibrated by a systematic study determining the size and frequency of bubble formation as a function of pressure and flow conditions. Results turn out to be virtually independent of gravity. Different regimes of operations are identified and described, and basic properties of the behavior of the bubbles inside the nucleation cavity are discussed. The slug flow downstream the crossflow is characterized and shows some differences depending on gravity. Finally, we illustrate the use of a controlled regular slug flow generated by our device by using it as an input of a serpentine heat exchanger. This emphasizes an important virtue of our method for practical applications, namely, the ability to separate the process of bubble formation from the actual heat exchange by phase transformation in the region of interest.
  • Altres:

    Autor segons l'article: Bitlloch P; Ruiz X; Ramírez-Piscina L; Casademunt J
    Departament: Química Física i Inorgànica
    Autor/s de la URV: Ruiz Martí, José Javier
    Paraules clau: Turbulent Heat-transfer Drop
    Resum: © American Institute of Aeronautics and Astronautics Inc.. All rights reserved. We design, construct, and test a device for controlled boiling by means of local vapor bubble formation in a cavity that injects vapor bubbles in a capillary crossflow. The outcome of the device is a regular slug flow of approximately monodisperse bubbles that can be used for a variety of applications. The setup is designed to be independent of gravity level and is tested succesfully both in normal gravity and in microgravity using drop tower experiments. The device is calibrated by a systematic study determining the size and frequency of bubble formation as a function of pressure and flow conditions. Results turn out to be virtually independent of gravity. Different regimes of operations are identified and described, and basic properties of the behavior of the bubbles inside the nucleation cavity are discussed. The slug flow downstream the crossflow is characterized and shows some differences depending on gravity. Finally, we illustrate the use of a controlled regular slug flow generated by our device by using it as an input of a serpentine heat exchanger. This emphasizes an important virtue of our method for practical applications, namely, the ability to separate the process of bubble formation from the actual heat exchange by phase transformation in the region of interest.
    Àrees temàtiques: Nutrição Medicina ii Engineering, aerospace Engenharias iv Engenharias iii Ciência da computação Biodiversidade Aerospace engineering & technology Aerospace engineering
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 00011452
    Adreça de correu electrònic de l'autor: josepxavier.ruiz@urv.cat
    Identificador de l'autor: 0000-0003-4020-4457
    Data d'alta del registre: 2023-02-23
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://arc.aiaa.org/doi/10.2514/1.J058619
    Referència a l'article segons font original: Aiaa Journal. 58 (9): 4017-4027
    Referència de l'ítem segons les normes APA: Bitlloch P; Ruiz X; Ramírez-Piscina L; Casademunt J (2020). Controlled generation of vapor/liquid slug flows by local boiling in microgravity. Aiaa Journal, 58(9), 4017-4027. DOI: 10.2514/1.J058619
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.2514/1.J058619
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2020
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Aerospace Engineering,Aerospace Engineering & Technology,Engineering, Aerospace
    Turbulent
    Heat-transfer
    Drop
    Nutrição
    Medicina ii
    Engineering, aerospace
    Engenharias iv
    Engenharias iii
    Ciência da computação
    Biodiversidade
    Aerospace engineering & technology
    Aerospace engineering
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