抄録
In the simulation of fire whirl, the effect of the turbulent viscosity model in LES of FDS (Fire Dynamics Simulator) is investigated. The latest FDS version 6 employs five kinds of the turbulence viscosity model; (a) Constant coefficient Smagorinsky model, (b) Dynamic Smagorinsky model, (c) Deardorff model, (d) Vreman's eddy viscosity model, (e) Renormalization group eddy viscosity model. All of these models are tested, and then clear influence of the model does not appear in fire whirls at this calculation conditions. However, the influence in a flow field at the downstream of the L-shaped fire source is observed. This has been suggested that there is a need for caution in predicting the spread of fire.
