Numerical simulation on temperature in wood crib fires

Abstract

Temperature from burning wood cribs will be simulated in this paper by sub-grid scale model in fire dynamics simulator. A baseline gas phase uncertainty is determined for simulating wood crib fire spread scenarios. This uncertainty is based on a sensitivity analysis of key input parameters and their subsequent effect on key output variables that are important for fire spread. Effects of different grid systems, computing domains and moisture contents on the predictions were studied first and then used to study the gaseous phase sensitivity. The gaseous phase input variables considered are: Smagorinsky constant, Prandtl number, and Schmidt number. The results show that the predictions for temperature have good agreement with experiment with the values of 0.25, 0.7, 0.4, and 5 for Smagorinsky constant, turbulent Schmidt number, and turbulent Prandtl number, respectively.