The goal of this section is to get the user familiar with the different model attributes that are required to effectively model atmospheric wind in PyroSim. The simulation runs for a total of 600 seconds. ![]() One of the buildings is configured as a 50,000kW ultra-fast t^2 growth fire using an Oak Wood Reaction. The files provided above model a large 500mx500mx200m area with a number of large obstructions representing buildings and large obstructions like shipping containers. To learn about the Monin-Obukhov Similarity or simulating wind in general, check out Section 18.1 of the FDS User Guide. It will provide an example of the first two cases listed above. While the latter two methods are more accurate, this tutorial is intended only to provide a simple understanding of wind simulation in PyroSim. With yet more complexity, the user can define this varying wind field to also vary over altitude.įinally, the user can also model wind conditions entirely differently, utlilizing the Monin-Obukhov Similarity theory. It is possible to model and observe fire simulation effects due to wind and atmospheric conditions with PyroSim and FDS.įDS provides tools to model these conditions with a range of complexity.Īt the most basic level, a simple initial wind condition can be modeled by defining a direction and windspeed.Īdding more complexity to the condition, the user can define an initial wind field that varies direction and windspeed over time. Read through the User Manual sections on Wind Parameters and Reserved Surfaces.(These models are modified versions of the wind_example_32.fds verification model provided by NIST.) Download the Simple Wind in PyroSim models to follow along.
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