One of the critical issues in fire dynamic simulation is the selection of suitable combustion model. Typically, combustion models based on infinite fast chemistry are used in fires. In this paper, the flamelet generated manifold (FGM) has been used as a combustion model and the fireFoam solver of OpenFOAM has been used. Two distinct FGMs, with and without radiation coupling, have been investigated to illustrate the role of radiation in simulations. The energy equation with discrete ordinates radiation model is used for coupling of FGM with radiation. These models will be examined in two scenarios of the pool and compartment fire. The FGM with the heat equation is in a good agreement with the experiments. In addition, the basic FGM has a deviation from the experimental results, in a pool fire scenario. The mean of vertical velocity of basic FGM and FGM with energy equation has 40 and 15 percent relative error, respectively, in the pool fire scenario. In the compartment fire, FGM model, with and without radiation coupling shows the same behavior and the velocity results have 9% relative error in the doorway. In general, the radiation coupling in pool fire is more important than compartment scenario.

火灾动态模拟中的关键问题之一是选择合适的燃烧模型。通常，在火灾中使用基于无限快速化学的燃烧模型。在本文中，小火焰生成歧管（FGM）被用作燃烧模型，而OpenFOAM的fireFoam解算器已被使用。已经研究了两种带有和不带有辐射耦合的FGM，以说明辐射在模拟中的作用。将具有离散纵坐标辐射模型的能量方程用于FGM与辐射的耦合。这些模型将在池火和车厢火灾两种情况下进行检查。具有热方程的FGM与实验非常吻合。另外，在池火情况下，基本的FGM与实验结果存在偏差。在水池着火情况下，基本FGM和具有能量方程的FGM的垂直速度平均值相对误差分别为40％和15％。在车厢火灾中，带有和不带有辐射耦合的FGM模型都表现出相同的行为，并且速度结果在门口具有9％的相对误差。通常，池火中的辐射耦合比隔室场景更重要。