Comparison and investigation of high HRR fire simulation in enclosed compartment with FDS and OpenFOAM

One of the powerful tools for fire investigation is Computational Fluid Dynamics, which has the capability to predict all influential parameters in fire, such as temperature, velocity, pressure, toxic species, and radiation. However, this method requires validation to assess the accuracy of the results. This can be achieved by simulating and comparing the results with experimental data to evaluate the numerical accuracy and examine the validity of the governing models used in the simulation. In this study, the temperature conditions, velocity, and combustion species were investigated and analyzed in the geometry of the fire compartment, by comparing the results of two software, FDS and OpenFOAM. It was observed that both software have similar validation results, although OpenFOAM performs slightly better than FDS. For instance, the temperature and CO2 species results in OpenFOAM have a relative error of 22.4 and 16%, while FDS have a relative error of 24 and 31%.