Large-eddy simulation of 1-m methanol pool fire using Lattice Boltzmann method

  • Taha, Mostafa (Aix-Marseille University)
  • Zhao, Song (Aix-Marseille University)
  • Lamorlette, Aymeric (Aix-Marseille University)
  • Consalvi, Jean-Louis (Aix-Marseille University)
  • Boivin, Pierre (Aix-Marseille University)

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The modeling of large-scale pool fire is of significant importance as it represents a canonical scenario for unwanted fires. A pressure based lattice Boltzmann (LBM) solver with low-Mach number approximation is used for the first time to simulate a 1m-diameter pool methanol fire. The configuration has been recently investigated experimentally by Sung et al. in the National Institute of Standards and Technology (NIST). This test case has been investigated numerically by means of LES in an attempt to reproduce the experimental results. In the context of well-ventilated fires, the combustion can be considered infinitely fast leading to a combustion process controlled mainly by the mixing process between fuel and oxidizer. Consistently, an extended version of the eddy dissipation concept (EDC) for LES is implemented for the present simulations. The validation of the model is done by comparing the velocity and temperature fields, flame height as well as puffing frequency, which is a typical phenomenon of pool fires.