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Review of convective heat transfer modelling in CFD simulations of fire-driven flows

Georgios Maragkos (UGent) and Tarek Beji (UGent)
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Abstract
Progress in fire safety science strongly relies on the use of Computational Fluid Dynamics (CFD) to simulate a wide range of scenarios, involving complex geometries, multiple length/time scales and multi-physics (e.g., turbulence, combustion, heat transfer, soot generation, solid pyrolysis, flame spread and liquid evaporation), that could not be studied easily with analytical solutions and zone models. It has been recently well recognised in the fire community that there is need for better modelling of the physics in the near-wall region of boundary layer combustion. Within this context, heat transfer modelling is an important aspect since the fuel gasification rate for solid pyrolysis and liquid evaporation is determined by a heat feedback mechanism that depends on both convection and radiation. The paper focuses on convection and reviews the most commonly used approaches for modelling convective heat transfer with CFD using Large Eddy Simulations (LES) in the context of fire-driven flows. The considered test cases include pool fires and turbulent wall fires. The main assumptions, advantages and disadvantages of each modelling approach are outlined. Finally, a selection of numerical results from the application of the different approaches in pool fire and flame spread cases, is presented in order to demonstrate the impact that convective heat transfer modelling can have in such scenarios.
Keywords
Fluid Flow and Transfer Processes, Computer Science Applications, Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science, heat transfer, convection, fire, modelling, CFD, LES, LARGE-EDDY SIMULATION, POOL FIRES, FLAME SPREAD, LIQUID FUEL, WALL, FIRES, FEEDBACK

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MLA
Maragkos, Georgios, and Tarek Beji. “Review of Convective Heat Transfer Modelling in CFD Simulations of Fire-Driven Flows.” APPLIED SCIENCES-BASEL, vol. 11, no. 11, 2021, doi:10.3390/app11115240.
APA
Maragkos, G., & Beji, T. (2021). Review of convective heat transfer modelling in CFD simulations of fire-driven flows. APPLIED SCIENCES-BASEL, 11(11). https://doi.org/10.3390/app11115240
Chicago author-date
Maragkos, Georgios, and Tarek Beji. 2021. “Review of Convective Heat Transfer Modelling in CFD Simulations of Fire-Driven Flows.” APPLIED SCIENCES-BASEL 11 (11). https://doi.org/10.3390/app11115240.
Chicago author-date (all authors)
Maragkos, Georgios, and Tarek Beji. 2021. “Review of Convective Heat Transfer Modelling in CFD Simulations of Fire-Driven Flows.” APPLIED SCIENCES-BASEL 11 (11). doi:10.3390/app11115240.
Vancouver
1.
Maragkos G, Beji T. Review of convective heat transfer modelling in CFD simulations of fire-driven flows. APPLIED SCIENCES-BASEL. 2021;11(11).
IEEE
[1]
G. Maragkos and T. Beji, “Review of convective heat transfer modelling in CFD simulations of fire-driven flows,” APPLIED SCIENCES-BASEL, vol. 11, no. 11, 2021.
@article{01GVG7S6J3KN145A0T10VK9RSK,
  abstract     = {{Progress in fire safety science strongly relies on the use of Computational Fluid Dynamics (CFD) to simulate a wide range of scenarios, involving complex geometries, multiple length/time scales and multi-physics (e.g., turbulence, combustion, heat transfer, soot generation, solid pyrolysis, flame spread and liquid evaporation), that could not be studied easily with analytical solutions and zone models. It has been recently well recognised in the fire community that there is need for better modelling of the physics in the near-wall region of boundary layer combustion. Within this context, heat transfer modelling is an important aspect since the fuel gasification rate for solid pyrolysis and liquid evaporation is determined by a heat feedback mechanism that depends on both convection and radiation. The paper focuses on convection and reviews the most commonly used approaches for modelling convective heat transfer with CFD using Large Eddy Simulations (LES) in the context of fire-driven flows. The considered test cases include pool fires and turbulent wall fires. The main assumptions, advantages and disadvantages of each modelling approach are outlined. Finally, a selection of numerical results from the application of the different approaches in pool fire and flame spread cases, is presented in order to demonstrate the impact that convective heat transfer modelling can have in such scenarios.}},
  articleno    = {{5240}},
  author       = {{Maragkos, Georgios and Beji, Tarek}},
  issn         = {{2076-3417}},
  journal      = {{APPLIED SCIENCES-BASEL}},
  keywords     = {{Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science,heat transfer,convection,fire,modelling,CFD,LES,LARGE-EDDY SIMULATION,POOL FIRES,FLAME SPREAD,LIQUID FUEL,WALL,FIRES,FEEDBACK}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{24}},
  title        = {{Review of convective heat transfer modelling in CFD simulations of fire-driven flows}},
  url          = {{http://doi.org/10.3390/app11115240}},
  volume       = {{11}},
  year         = {{2021}},
}

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