Simulation Software for Science and Engineering
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This is a maintenance release of PetraSim. This version increases the number of cells that can be used in simulations, adds support for cell-by-cell porosity, adds support for well data import, and includes several important bug fixes for TMVOC. Read More »
This is a maintenance release of PyroSim. This release includes bug fixes and changes to the way PyroSim handles species. Read More »
This is a maintenance release of Pathfinder. This version includes fixes for issues that could cause occupants to become stuck and PyroSim import support. Read More »
This is an addendum to the Part 4 video on fire modeling. We re-analyzed the problem, changing the Heat Release Rate Per Unit Area (HRRPUA) from a constant value to a function (or curve). With this change, the new calculated total Heat Release Rate (HRR) is a reasonably close match to the measured experimental curve. The level of detail in the model is about as complicated as can be made without also simulating the pyrolysis process. Read More »
In this video we show how to model a fire using a specified heat release rate per unit area (HRRPUA), an ignition temperature, and burn away. This is about as complicated a model that can be made without also simulating the pyrolysis process.
To guide this discussion, we use an experiment and analysis performed at the VTT Research Center of Finland. I chose this example because the paper clearly describes the details of both the experiment and the supporting analysis and because one of the experiments burned a wood crib.
The simulation shows both the benefits and drawbacks of this approach.
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