This demonstrates smoke movement in an atrium with and without extraction fans. It shows how a fire in one room can distribute smoke throughout the HVAC network. In this example you will use the Heating Ventilation and Air Conditioning (HVAC) features to model a duct that circulates air in two rooms. Unless verified by experiment, the uncertainties of the resulting simulation are large. It is more appropriate for researchers or forensic investigators. This approach to modeling a fire pushes the limits of FDS capabilities and is beyond the usual heat release rate approach used by fire safety engineers. Although the geometry of the model is relatively simple, the fire is ignited by glowing particles that heat the upholstery of a sofa. We also show how the use a viewpoint and section box to display a selected part of the model. In this tutorial you will import a CAD file then define a fire in the CAD model geometry. Practical details that this example provides include how to create a fire that varies with time and how to define a reaction that corresponds to that described in the New Zealand building code.

The door will be initially closed, but will open after the smoke detector is activated. In this tutorial you will simulate a growing fire in the corner of a room. The critical concept is that a reaction defines the heat released per unit mass of fuel and that the specified HRRPUA (and associated surface) is used to calculated the mass flow rate of fuel from the burning surface. This is both the simplest and most commonly used approach for fire safety engineers to represent fire. In this example you will create a fire by specifying a Heat Release Rate per Unit Area (HRRPUA) on a burner surface. It demonstrates how 'vents' are used to define boundary conditions how flow into a model must have an exit. This example is an air flow problem using a supply vent on one side of a room and an open vent on the opposite side.

Printable Version PyroSim Fundamentals Reading Time: 3 minutes Support Filesĭownload pyrosim_examples.zip which contains the necessary files to complete the following PyroSim Fundamentals Tutorials.

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