News

Updated FDS Combustion and Fuel Composition Calculators

September 2, 2015
This post describes updated combustion product and fuel composition spreadsheet calculators for use with FDS (the Fire Dynamics Simulator from NIST). Read More...

Heat Release Rates of Burning Items in Fires

August 19, 2015
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.  Read More...

PyroSim Mesh Tools

April 17, 2015
This quick tip goes over a few of the available features in PyroSim for Meshes. Read More...

Radiative Fraction and Q_RADI Output

February 26, 2015
The heat released as a fire burns is distributed to the environment primarily through convection and radiation. But, when you check the FDS output files you may see a different fractional amount of radiation in the Q_RADI column. Read More...

Training Events in Singapore and Malaysia

February 20, 2015
Three training events will be hosted in Singapore and Malaysia by our distribution partner Building System & Diagnostics Pte Ltd (BSD). Bryan Klein from Thunderhead Engineering will be presenting the course materials. Read More...

Create a t-squared Fire

January 7, 2015
In PyroSim, there is not a direct way to enter the alpha value for a t-squared fire. This short video will show you how you can determine the time to peak HRRPUA. Read More...

Add Slice Output

December 19, 2014
Adding Slice output to a model is quick and easy with the Slice Tool. This video demonstrates how to add a slice and to change the slice output options with the Slice tool properties dialog. Read More...

Modeling a Pressure Relief Vent

November 18, 2014
This post analyzes a pressure relief vent, where air is injected into a room, the pressure in the room is monitored, and a vent is opened when a set pressure is reached. The key is to include at least two pressure zones in your model. Read More...

PyroSim/FDS and Pathfinder Training at International Locations

November 3, 2014

In 2015, Thunderhead Engineering will¬†offer PyroSim/FDS and Pathfinder training at several international locations. Each training session will include a two day PyroSim/FDS workshop, a two day Pathfinder workshop, and a one day introduction to an FDS/PyroSim distance education course offered through Seneca College. Read More...

Online Participation – Fire and Evacuation Modeling Technical Conference 2014

September 4, 2014
Thunderhead Engineering is hosting the 2nd Fire and Evacuation Modeling Technical Conference on September 8-10, 2014 in Gaithersburg, Maryland. There will be two days of technical presentations on fire and evacuation modeling (September 8-9), with an optional third day of workshop classes on PyroSim and Pathfinder (September 10).¬†Over 100 participants have registered to attend in ... Read More...