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Multi-physics methodology for phase change due to rapidly depressurised two-phase flows.

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Title: Multi-physics methodology for phase change due to rapidly depressurised two-phase flows.
Authors: Chávez-Modena, M.1,2 (AUTHOR) m.chavez@upm.es, Rubio, G.1,2 (AUTHOR), Valero, E.1,2 (AUTHOR), Mira, D.3 (AUTHOR), Lehmkuhl, O.3 (AUTHOR)
Source: International Journal of Multiphase Flow. Nov2021, Vol. 144, pN.PAG-N.PAG. 1p.
Subjects: Fire extinguishing agents, Theory of change, Firefighting, Spray nozzles, Two-phase flow, Atomization, Nozzles
Abstract: • CFD methodology to couple with a Zonal modelling for fire-extinguishing systems. • Atomization characterization of Novec-1230 agent through a nozzle. • A multiphase conservative level set LES predicts the primary breakup atomization. • A particle based/URANS method solves the spreading of the agent and phase change. Zonal modeling is a common technique for the numerical certification of fire-extinguishing systems, however it is not valid to simulate the complex physical phenomena that occurs near the agent injection. We present a multi-scale method for the accurate generation of inflow boundary conditions valid for zonal modeling based on the description of the phase change of a rapidly depressurised mist of a fire suppression system. The generation of accurate boundary conditions includes the characterization of the injection of the fire suppression agent from atomization to evaporation and mixing. The multi-scale methodology is based on the use of a high fidelity multiphase conservative level set LES for the characterization of the nozzle to develop an empirical model for primary breakup. Secondly, a low fidelity particle-based method with phase change and unsteady RANS is used for parametric studies. This multi-scale approach requires an affordable computational effort. The multi-scale methodology is tested in a system consisting of a pressurised fire extinguishing agent (Novec-1230) that is injected into the ambient through a nozzle that produces the atomization of the agent. The accuracy of the developed approach is compared with the experimental data. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Multiphase Flow 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: 152535855
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Multi-physics methodology for phase change due to rapidly depressurised two-phase flows.
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  Data: <searchLink fieldCode="AR" term="%22Chávez-Modena%2C+M%2E%22">Chávez-Modena, M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> m.chavez@upm.es</i><br /><searchLink fieldCode="AR" term="%22Rubio%2C+G%2E%22">Rubio, G.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Valero%2C+E%2E%22">Valero, E.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mira%2C+D%2E%22">Mira, D.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lehmkuhl%2C+O%2E%22">Lehmkuhl, O.</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Multiphase+Flow%22">International Journal of Multiphase Flow</searchLink>. Nov2021, Vol. 144, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Fire+extinguishing+agents%22">Fire extinguishing agents</searchLink><br /><searchLink fieldCode="DE" term="%22Theory+of+change%22">Theory of change</searchLink><br /><searchLink fieldCode="DE" term="%22Firefighting%22">Firefighting</searchLink><br /><searchLink fieldCode="DE" term="%22Spray+nozzles%22">Spray nozzles</searchLink><br /><searchLink fieldCode="DE" term="%22Two-phase+flow%22">Two-phase flow</searchLink><br /><searchLink fieldCode="DE" term="%22Atomization%22">Atomization</searchLink><br /><searchLink fieldCode="DE" term="%22Nozzles%22">Nozzles</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • CFD methodology to couple with a Zonal modelling for fire-extinguishing systems. • Atomization characterization of Novec-1230 agent through a nozzle. • A multiphase conservative level set LES predicts the primary breakup atomization. • A particle based/URANS method solves the spreading of the agent and phase change. Zonal modeling is a common technique for the numerical certification of fire-extinguishing systems, however it is not valid to simulate the complex physical phenomena that occurs near the agent injection. We present a multi-scale method for the accurate generation of inflow boundary conditions valid for zonal modeling based on the description of the phase change of a rapidly depressurised mist of a fire suppression system. The generation of accurate boundary conditions includes the characterization of the injection of the fire suppression agent from atomization to evaporation and mixing. The multi-scale methodology is based on the use of a high fidelity multiphase conservative level set LES for the characterization of the nozzle to develop an empirical model for primary breakup. Secondly, a low fidelity particle-based method with phase change and unsteady RANS is used for parametric studies. This multi-scale approach requires an affordable computational effort. The multi-scale methodology is tested in a system consisting of a pressurised fire extinguishing agent (Novec-1230) that is injected into the ambient through a nozzle that produces the atomization of the agent. The accuracy of the developed approach is compared with the experimental data. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Multiphase Flow 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:
  BibEntity:
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      – Type: doi
        Value: 10.1016/j.ijmultiphaseflow.2021.103788
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Fire extinguishing agents
        Type: general
      – SubjectFull: Theory of change
        Type: general
      – SubjectFull: Firefighting
        Type: general
      – SubjectFull: Spray nozzles
        Type: general
      – SubjectFull: Two-phase flow
        Type: general
      – SubjectFull: Atomization
        Type: general
      – SubjectFull: Nozzles
        Type: general
    Titles:
      – TitleFull: Multi-physics methodology for phase change due to rapidly depressurised two-phase flows.
        Type: main
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          Name:
            NameFull: Chávez-Modena, M.
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            NameFull: Rubio, G.
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            NameFull: Valero, E.
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            NameFull: Mira, D.
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            NameFull: Lehmkuhl, O.
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          Dates:
            – D: 01
              M: 11
              Text: Nov2021
              Type: published
              Y: 2021
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              Value: 144
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            – TitleFull: International Journal of Multiphase Flow
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