FDS and Smokeview are used in concert to model and visualize fire phenomena. Most field or surface data are visualized with Smokeview. Time histories of various quantities at a single point in space or global quantities like the fire’s heat release rate (HRR) are saved in simple, comma-delimited text files that can be plotted using a spreadsheet program, like Calc or Microsoft Excel. Mass and energy fluxes through openings or solids.Sprinkler and detector activation times.Total Heat Release Rate (HRR)Heat Release Rate (HRR).Global quantities recorded by the program include: Heat flux, both radiative and convective.

On solid surfaces, FDS predicts additional quantities associated with the energy balance between gas and solid phase, including: Smoke concentration and visibility estimates.Gas species concentration (water vapor, CO 2, CO, N 2).Typical output quantities for the gas phase include: Before a calculation is started, carefully consider what information should be saved. Remember that all output quantities must be specified at the start of the calculation. Even though only a small fraction of the computed information can be saved, the output typically consists of fairly large data files (it can be many GBytes!). So the user must carefully select what data to save, much like one would do in designing an actual experiment. In addition, FDS computes at solid surfaces the temperature, heat flux, mass loss rate, and various other quantities. There are typically hundreds of thousands to millions of grid cells and thousands to hundreds of thousands of time steps. Prescribing output įDS computes the temperature, density, pressure, velocity and chemical composition within each numerical grid cell at each discrete time step. In most cases, there is no way to retrieve information after the calculation ends if it was not specified from the start. 1.12 Interfacing with structural modelsįinally, the user prescribes the output quantities (DEVC, SLCF, BNDF, ISOF).Īll output quantities must be specified at the start of the calculation.

Radiation on surface pyrosim