News

PyroSim 2014.1.0331

March 31, 2014
This is a maintenance release of PyroSim. This release includes bug fixes and changes to the way PyroSim handles species. Read More...

Pathfinder 2014.1.0319

March 19, 2014

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...

Modeling Fire, Part 4 Addendum – Re-Analysis using HRRPUA Curve

March 19, 2014
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). Read More...

Modeling Fire, Part 4 – Combustion with HRR, Ignition, and Burn Away

March 5, 2014
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 as models can be made without also simulating pyrolysis. Read More...

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...