News

Modeling Fire, Part 3 – Combustion using HRR

February 23, 2014
FDS can be a useful tool for both a fire protection engineer and a fire researcher. The challenge is that this can result in a bewildering array of options with respect to modeling the combustion process. Read More...

Modeling Fire, Part 2 – Heat Release Rate

February 14, 2014
When we specify a Heat Release Rate, we are really specifying the rate at which fuel is released into the fire simulation. The fuel mass flow rate is calculated so that combustion will release heat at the desired rate. Read More...

Modeling Fire, Part 1 – Reactions

February 14, 2014
All PyroSim (FDS) models that include combustion must define a gas phase reaction that converts fuel to combustion products. We review the "simple chemistry" approach in FDS. Read More...

Pathfinder 2014.1.0207

February 7, 2014
This is a maintenance release of Pathfinder. This version includes a fix for a bug that could cause simulations to crash.  Read More...

Pathfinder 2014.1.0203

February 3, 2014
This is a maintenance release of Pathfinder. This version adds import support for PSM files from PyroSim 2014 and fixes several bugs that could cause simulations to become stuck. Read More...

PetraSim – A shallow geothermal model with pipe flow

February 3, 2014
We recently had a customer request for some help with a shallow geothermal model. I thought it would be interesting to show one approach to simulating fluid flow in tubes (pipes) with heat conduction into the surrounding soil. When I first saw this problem, I thought that PetraSim (TOUGH2) might not be the best code for the solution. The pipe geometry would need to be approximated and if conduction is the dominant mechanism in the soil, there might be other codes that could do a good job. However, PetraSim (TOUGH2) does offer some unique advantages to simulate complex heat transfer in the soil, including the potential heat transport due to groundwater flow.  Read More...

Using PyroSim for Parallel Processing of Multiple Meshes

January 27, 2014
This video shows reasons to use multiple meshes, rules and guidelines for defining multiple meshes, how to use the multiple mesh tools, and how to run a parallel processor solution. Read More...

PyroSim 2014.1.0110

January 10, 2014

This is a maintenance release of PyroSim. This version fixes bugs related to support for FDS6 and HVAC. Read More...

HVAC Pressure Drop Verification

January 7, 2014
In this model, there are three HVAC nodes and two HVAC ducts. The calculation for the expected pressure loss in the duct without a fan was done in a spreadsheet that you can download. Read More...

Create CO Sampling Device

December 28, 2013
This video demonstrates how to add a carbon monoxide detector and view its output. Read More...