Articles producció científica> Química Física i Inorgànica

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

  • Identification data

    Identifier: imarina:8263166
    Authors:
    Bitlloch PRuiz XRamírez-Piscina LCasademunt J
    Abstract:
    © 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.
  • Others:

    Author, as appears in the article.: Bitlloch P; Ruiz X; Ramírez-Piscina L; Casademunt J
    Department: Química Física i Inorgànica
    URV's Author/s: Ruiz Martí, José Javier
    Keywords: Turbulent Heat-transfer Drop
    Abstract: © 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.
    Thematic Areas: Nutrição Medicina ii Engineering, aerospace Engenharias iv Engenharias iii Ciência da computação Biodiversidade Aerospace engineering & technology Aerospace engineering
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 00011452
    Author's mail: josepxavier.ruiz@urv.cat
    Author identifier: 0000-0003-4020-4457
    Record's date: 2023-02-23
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://arc.aiaa.org/doi/10.2514/1.J058619
    Papper original source: Aiaa Journal. 58 (9): 4017-4027
    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
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.2514/1.J058619
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2020
    Publication Type: Journal Publications
  • Keywords:

    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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