A Multi-Fidelity Framework for Wildland Fire Behavior Simulations over Complex Terrain

A method for the large-eddy simulation (LES) of wildfire spread over complex terrain is presented. In this scheme, a cut-cell immersed boundary (CC-IBM) used to render terrain, defined by tessellation, on rectilinear Cartesian grid. Discretization scalar transport equations chemical species done via finite volume scheme cut-cells intersection geometry and cells. Momentum heat transfer close are handled using dynamic wall models direct forcing method. new “open” convective inflow/outflow specifying atmospheric wind conditions Additionally, three basic approaches have been explored model fire spread: (1) Representing vegetation as collection Lagrangian particles, (2) representing semi-porous boundary, (3) level set method, in which spreads function slope, type, speed. Several test validation cases reported demonstrate capabilities novel methodology.