The aim of this paper is to create a user-friendly computational tool for analysis of wildland fire behavior and its effect on urban and other structures. A physics-based multiphase Computational Fluid Dynamics (CFD) model of wildfire initiation and spread has been developed and incorporated into the multi-purpose CFD software, PHOENICS. It accounts for all the important physicochemical processes: drying, pyrolysis, char combustion, turbulent combustion of gaseous products of pyrolysis, exchange of mass, momentum and energy between gas and solid phase, turbulent flow and convective, conductive and radiative heat transfer. Turbulence is modeled by using a RNG k-ε model and the radiative heat transfer is represented by the IMMERSOL model. The Arrhenius-type kinetics are used for heterogeneous reactions and the eddy-breakup approach is applied for gaseous combustion. The model has been validated using the experimental data.

本文的目的是创建一个用户友好的计算工具，用于分析荒地火灾行为及其对城市和其他建筑物的影响。已经开发了野火引发和蔓延的基于物理学的多相计算流体动力学（CFD）模型，并将其合并到多功能CFD软件PHOENICS中。它说明了所有重要的物理化学过程：干燥，热解，焦炭燃烧，热解气态产物的湍流燃烧，气相与固相之间的质量，动量和能量交换，湍流以及对流，传导和辐射换热。湍流通过使用RNGk -ε建模IMMERSOL模型代表辐射热传递。Arrhenius型动力学用于非均相反应，涡流分解法用于气态燃烧。该模型已使用实验数据进行了验证。