Simulation of Pool and Compartment Fire Using Flamelet Generated Manifold With/Without Radiation Coupling

Abstract

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.