Simulation Software for Science and Engineering
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As part of preparing PyroSim examples, we wanted to define a reaction that corresponded to the New Zealand building code, C/VM2 - Verification Method: Framework for Fire Safety Design. The New Zealand code defines the fire products, it does not specify the fuel composition, which is required for FDS input. In this post we calculate the required FDS fuel formula that corresponds to the New Zealand fire.
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A paper by Hyeong-Jin Kim and David Lilley (Heat Release Rates of Burning Items in Fires, AIAA 2000-0722, January 2000) summarizes experimentally measured heat release rates for more than 60 different items that could be involved in fires. The data sets used by Kim and Lilley include FASTLite, HAZARD, and the Building and Fire Research Laboratory data sets. As part of preparing PyroSim examples, we developed a spreadsheet that calculates the heat release rates using the data and method described in the paper.
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This release includes expanded OpenMP threading support in FDS, a new lighting model in Smokeview, and options to save views and clip geometry. Read More »
Fire protection engineers, also referred to as fire safety engineers, have a fundamental responsibility to compare tenability time vs. egress time. Tenability time refers to the duration between initial combustion and the point at which smoke reaches life threatening thickness. Fire simulations performed with PyroSim and FDS help evaluate tenability properties such as visibility, CO mixture fraction, and temperature. Read More »
Pathfinder was originally created as a tool for evacuation-based pedestrian simulation. Throughout its lifecycle, users have realized its capabilities to also create non-evacuation scenarios. Examples include customers shopping at a mall, passengers finding a gate at an airport, and health professionals tending to patients at a hospital. These ambitious circulation-based simulations can be approximated through some advanced techniques in Pathfinder. Read More »