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CFD modeling of liquid entrainment through vertical T-junction of fourth stage automatic depressurization system (ADS-4).

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Title: CFD modeling of liquid entrainment through vertical T-junction of fourth stage automatic depressurization system (ADS-4).
Authors: Khan, Irfan1 (AUTHOR), Wang, Mingjun1 (AUTHOR) wangmingjun@mail.xjtu.edu.cn, Abdul Basit, Muhammad1 (AUTHOR), Tian, Wenxi1 (AUTHOR), Su, Guanghui1 (AUTHOR), Qiu, Suizheng1 (AUTHOR) szqiu@mail.xjtu.edu.cn
Source: Annals of Nuclear Energy. Sep2021, Vol. 159, pN.PAG-N.PAG. 1p.
Subjects: Computational fluid dynamics, Supply & demand, Liquids, Gas flow, Flow velocity, Entrainment (Physics)
Abstract: • A three dimensional CFD model for liquid entrainment based on coupled Eulerian-Eulerian VOF formulation is proposed. • The CFD model is validated with experimental results. • The effect of gas mass flow rates and vertical to horizontal branch diameter ratio on liquid entrainment are determined. • Flow characteristics during liquid entrainment phenomena through vertical T-junction are studied. In this study, a three-dimensional (3D) transient computational fluid dynamics (CFD) model is presented to investigated liquid entrainment in gas–liquid flow through vertical T-junction of fourth stage automatic depressurization system (ADS-4) in AP1000. A specialized CFD model for the liquid entrainment phenomenon study, which is based on coupled Eulerian-Eulerian VOF (volume of fluid) formulation with suitable interfacial drag and standard κ - ε turbulence model for each phase was proposed. The entrainment rate was calculated and results were validated with ADETEL experimental data, which was built at XJTU-NuTheL. The good agreement between CFD calculations and experimental data demonstrated that the proposed CFD model could reasonably predict entrainment within the studied range. The effect of vertical to horizontal branch diameter ratio and gas mass flow rates on liquid entrainment were also studied. In addition, the liquid volume fraction distributions and velocity field were investigated to develop an understanding of the entrainment process. The relatively high demand for computational resources due to very small timestep size and small grid size to accommodate high flow velocities was found to be a challenge. [ABSTRACT FROM AUTHOR]
Copyright of Annals of Nuclear Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 150589083
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: CFD modeling of liquid entrainment through vertical T-junction of fourth stage automatic depressurization system (ADS-4).
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  Data: <searchLink fieldCode="AR" term="%22Khan%2C+Irfan%22">Khan, Irfan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Mingjun%22">Wang, Mingjun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wangmingjun@mail.xjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Abdul+Basit%2C+Muhammad%22">Abdul Basit, Muhammad</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Wenxi%22">Tian, Wenxi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Su%2C+Guanghui%22">Su, Guanghui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qiu%2C+Suizheng%22">Qiu, Suizheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> szqiu@mail.xjtu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Annals+of+Nuclear+Energy%22">Annals of Nuclear Energy</searchLink>. Sep2021, Vol. 159, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Supply+%26+demand%22">Supply & demand</searchLink><br /><searchLink fieldCode="DE" term="%22Liquids%22">Liquids</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+flow%22">Gas flow</searchLink><br /><searchLink fieldCode="DE" term="%22Flow+velocity%22">Flow velocity</searchLink><br /><searchLink fieldCode="DE" term="%22Entrainment+%28Physics%29%22">Entrainment (Physics)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: • A three dimensional CFD model for liquid entrainment based on coupled Eulerian-Eulerian VOF formulation is proposed. • The CFD model is validated with experimental results. • The effect of gas mass flow rates and vertical to horizontal branch diameter ratio on liquid entrainment are determined. • Flow characteristics during liquid entrainment phenomena through vertical T-junction are studied. In this study, a three-dimensional (3D) transient computational fluid dynamics (CFD) model is presented to investigated liquid entrainment in gas–liquid flow through vertical T-junction of fourth stage automatic depressurization system (ADS-4) in AP1000. A specialized CFD model for the liquid entrainment phenomenon study, which is based on coupled Eulerian-Eulerian VOF (volume of fluid) formulation with suitable interfacial drag and standard κ - ε turbulence model for each phase was proposed. The entrainment rate was calculated and results were validated with ADETEL experimental data, which was built at XJTU-NuTheL. The good agreement between CFD calculations and experimental data demonstrated that the proposed CFD model could reasonably predict entrainment within the studied range. The effect of vertical to horizontal branch diameter ratio and gas mass flow rates on liquid entrainment were also studied. In addition, the liquid volume fraction distributions and velocity field were investigated to develop an understanding of the entrainment process. The relatively high demand for computational resources due to very small timestep size and small grid size to accommodate high flow velocities was found to be a challenge. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Annals of Nuclear Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.anucene.2021.108317
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      – Code: eng
        Text: English
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        StartPage: N.PAG
    Subjects:
      – SubjectFull: Computational fluid dynamics
        Type: general
      – SubjectFull: Supply & demand
        Type: general
      – SubjectFull: Liquids
        Type: general
      – SubjectFull: Gas flow
        Type: general
      – SubjectFull: Flow velocity
        Type: general
      – SubjectFull: Entrainment (Physics)
        Type: general
    Titles:
      – TitleFull: CFD modeling of liquid entrainment through vertical T-junction of fourth stage automatic depressurization system (ADS-4).
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          Name:
            NameFull: Khan, Irfan
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            NameFull: Wang, Mingjun
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            NameFull: Abdul Basit, Muhammad
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            NameFull: Tian, Wenxi
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            NameFull: Su, Guanghui
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            – D: 01
              M: 09
              Text: Sep2021
              Type: published
              Y: 2021
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              Value: 159
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            – TitleFull: Annals of Nuclear Energy
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