Effects of varying Smagorinsky constant on simulating post-flashover fires

Gao Wan Zou, He Ping Tan, Wan Ki Chow, Ye Gao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

Air flow post-flashover room fire is weakly compressible. In this paper, Navier-Stokes equations in an appropriate form will be applied to simulate such motion. Large eddy simulation (LES) is used with the Smagorinsky sub-grid scale model. A pool fire was described by the combustion model based on simple and fast chemical reaction. Three-dimensional simulations were carried out by using different values of Smagorinsky sub-grid scale constant. Predicted results on air temperatures and radiative heat fluxes were compared with the experimental values. Results illustrated that the value of the Smagorinsky constant would affect the simulations for strong buoyant plume. Value of the Smagorinsky constant from 0.20 to 0.21 appears to be reasonable in simulating flashover with a filter width of 0.1m.
Original languageEnglish
Pages (from-to)107-119
Number of pages13
JournalInternational Journal of Computational Fluid Dynamics
Volume21
Issue number2
DOIs
Publication statusPublished - 1 Feb 2007

Keywords

  • Fire
  • Flashover
  • Large eddy simulation
  • Smagorinsky sub-grid scale constant

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Condensed Matter Physics

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