In some situations, the simplifying assumptions that must be made to allow practical modeling solutions to the analysis of consequences do not apply. In these cases, more detailed analysis is needed. In these situations the techniques of Computational Fluid Dynamics (CFD) are required to find solutions to complex problems where other, simpler models are not appropriate. For these situations we turn to CFD.
Video: CFD Simulation with FDS
For studies requiring CFD, Quest uses the open source software package Fire Dynamics Simulator (FDS), developed by the National Institute of Standards and Technology (NIST). FDS is a CFD model which numerically solves a form of the Navier-Stokes equations appropriate for low-speed, thermally-driven flow with an emphasis on smoke and heat transport from fires. Quest has used FDS to model various fires, as well as the dispersion of LNG vapors spilled into impoundment trenches.