Development of Wall-Adapting Local Eddy Viscosity Model for Study of Fire Dynamics in a Large Compartment

Abstract:

The Wall Adpating Local Eddy Viscosity (WALE) subgrid-scale turbulence model was adopted for an in-house large eddy simulation (LES) fire code in which the turbulence is fully coupled combustion and radiation models. The traditional Smagorinsky subgrid-scale model accounts only strain rate of the turbulent structure while the WALE model considers both the strain and the rotation rates. Furthermore, the WALE model automatically recovers the near wall-scaling for the eddy viscosity hence more adaptive for wall bounded flows.A 15 m long test hall fire was reconstructed by the in-house fire code with 1.5 MW fire source. The performance of the WALE model was assessed by comparingpredicted transient gas temperatures and velocities at various spatial locations.

• Periodical: Applied Mechanics and Materials (Volumes 444-445)
• Pages: 1579-1591
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.444-445.1579
• Online since: October 2013
• Authors: A.C.Y. Yuen, G.H. Yeoh, R.K.K. Yuen, S.M. Lo, T. Chen

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