Abstract
In this report, the authors tried to develop the physical model of scattering firebrands that is one of the propagation factors of urban fire propagation and simulate the scattering firebrands by means of CFD with a turbulence model. Actually, the shape of firebrands are various and the big firebrands have capacity of fire propagation. In this case to predict urban fire spreading correctly, using Lagrange equation that considered gravity and drag is desirable to simulate the each of firebrands scattering. In this report the authors assumed that firebrands are sphere, and analyzed scattering by using CFD.
