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@INPROCEEDINGS{Caldern:1049980,
      author       = {Calderón, I. and Majdalani, A. H. and Arnold, Lukas and
                      Jahn, W.},
      title        = {{I}nfluence of compartment geometry on internal flows in a
                      fully-developed fire},
      reportid     = {FZJ-2025-05694},
      pages        = {11},
      year         = {2025},
      abstract     = {Contemporary architecture and new structural materials
                      challenge the classical premise of fire safety:
                      compartmentalisation. The historical classification between
                      Regime I and Regime II is no longer sufficient to analyse
                      the new fire behaviours we are encountering. This article
                      presents an analysis of the impact of geometry on the
                      development of flows in a compartment fire. The study
                      contrasts the case of an almost cubic compartment with one
                      that doubles its depth, using a CFD model. The model is
                      validated using data from an experiment, where temperature
                      fields were measured, and from which the flow fields are
                      subsequently derived. Through computational models, the
                      impact of the backwall effect on the magnitude and direction
                      of velocities is observed. This effect increases velocity
                      magnitudes by $35\%$ and alters the flow direction. This
                      article analyses the case of a cubic compartment and one
                      with double the depth, examining how this variation affects
                      flow development. The analysis was conducted using FDS
                      simulations, validation the model with experimental data.
                      Streamline plots reveal that in cubic compartments, the
                      buoyancy of the flame does not directly influence the change
                      in flow direction; instead, it is primarily due to the
                      collision with the rear wall. Conversely, in the elongated
                      case the fluid dynamics are significantly affected by the
                      buoyancy of the fire plume, which deflects it toward the
                      ceiling.},
      month         = {Jun},
      date          = {2025-06-15},
      organization  = {11th International Seminar on Fire and
                       Explosion Hazards, Rome (Italy), 15 Jun
                       2025 - 20 Jun 2025},
      cin          = {IAS-7},
      cid          = {I:(DE-Juel1)IAS-7-20180321},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511)},
      pid          = {G:(DE-HGF)POF4-5111},
      typ          = {PUB:(DE-HGF)8},
      doi          = {10.34734/FZJ-2025-05694},
      url          = {https://juser.fz-juelich.de/record/1049980},
}