Articles producció científica> Enginyeria Mecànica

Vertically downward gas-liquid flow: Void fraction and pressure drop

  • Identification data

    Identifier: imarina:9369500
    Handle: https://hdl.handle.net/20.500.11797/imarina9369500
    Authors:
    Bouyahiaoui, HibaSaidj, FaizaArabi, AbderraoufAl-Sarkhi, AbdelsalamAzzi, Abdelwahid
    Abstract:
    Using an air-water mixture and 34 mm ID pipe, a series of pressure drop and void fraction measurements were collected. The observed flow regimes were falling film, annular, bubbly, cap bubble, slug, and churn flows. The temporal fluctuations of void fraction and pressure drop measurements were firstly studied using signals visualization and PDF. It was revealed that both signals can be used to identify the flow regimes. A new flow pattern map is proposed based on the Froude number, calculated using the mixture velocity of the two phases, and the ratio of gas-to-liquid superficial velocities. The behaviors of the total and frictional pressure drops were studied and the influence of the superficial velocities as well as the flow regimes were identified. The experimental results were compared to four existing vertically downward frictional pressure drop models, none of which provided accurate predictions.

  • Others:

    Author, as appears in the article.: Bouyahiaoui, Hiba; Saidj, Faiza; Arabi, Abderraouf; Al-Sarkhi, Abdelsalam; Azzi, Abdelwahid
    Department: Enginyeria Mecànica
    URV's Author/s: Arabi, Abderraouf
    Abstract: Using an air-water mixture and 34 mm ID pipe, a series of pressure drop and void fraction measurements were collected. The observed flow regimes were falling film, annular, bubbly, cap bubble, slug, and churn flows. The temporal fluctuations of void fraction and pressure drop measurements were firstly studied using signals visualization and PDF. It was revealed that both signals can be used to identify the flow regimes. A new flow pattern map is proposed based on the Froude number, calculated using the mixture velocity of the two phases, and the ratio of gas-to-liquid superficial velocities. The behaviors of the total and frictional pressure drops were studied and the influence of the superficial velocities as well as the flow regimes were identified. The experimental results were compared to four existing vertically downward frictional pressure drop models, none of which provided accurate predictions.
    Thematic Areas: Physics and astronomy (miscellaneous) Physics and astronomy (all) Mechanics Mechanical engineering Matemática / probabilidade e estatística General physics and astronomy Fluid flow and transfer processes Engenharias iv Engenharias iii Engenharias ii Ciência de alimentos Ciência da computação Biodiversidade
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: abderraouf.arabi@urv.cat
    Record's date: 2024-09-21
    Papper version: info:eu-repo/semantics/acceptedVersion
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: International Journal Of Multiphase Flow. 172 104711-
    APA: Bouyahiaoui, Hiba; Saidj, Faiza; Arabi, Abderraouf; Al-Sarkhi, Abdelsalam; Azzi, Abdelwahid (2024). Vertically downward gas-liquid flow: Void fraction and pressure drop. International Journal Of Multiphase Flow, 172(), 104711-. DOI: 10.1016/j.ijmultiphaseflow.2023.104711
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2024
    Publication Type: Journal Publications

  • Keywords:

    Fluid Flow and Transfer Processes,Mechanical Engineering,Mechanics,Physics and Astronomy (Miscellaneous)
    Physics and astronomy (miscellaneous)
    Physics and astronomy (all)
    Mechanics
    Mechanical engineering
    Matemática / probabilidade e estatística
    General physics and astronomy
    Fluid flow and transfer processes
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciência de alimentos
    Ciência da computação
    Biodiversidade

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