PetraSim 2015.1.1217 (Beta)

December 17, 2014

This is a beta release for PetraSim 2015. This release adds support for new TOUGH modules, 64-bit executables, as well as many bug fixes and new file handling options.


Configure Occupant Color

December 10, 2014
There are different ways to select and color agents in Pathfinder. This tutorial video shows how to color by agent Profile, Behavior and Occupant Group. 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.


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...

OpenMP Benchmarks

August 18, 2014
FDS now uses OpenMP to run faster on PCs that have multiple cores. This post presents two benchmark simulations that show how much improvement you can expect and how to configure simulations to use OpenMP effectively. Read More...

PetraSim Training and Upcoming Release

June 18, 2014

Two PetraSim training courses will be offered concurrent with the upcoming TOUGH Short Courses (September 15-19, 2014 at LBNL).  One PetraSim course will be offered on Tuesday and Wednesday morning and the second starting Wednesday afternoon and Thursday. This will allow attendees to participate in a PetraSim course either before or after a TOUGH short course. Details will be posted on the RockWare and PetraSim web sites by June 25.

We are also nearing release of a major upgrade to PetraSim. 


PetraSim 5.4.0418

April 18, 2014

This is a maintenance release of PetraSim. This version includes a bug fixes for well plots, TOUGH-FX results, and TMVOC initial conditions.


PetraSim 5.4.0414

April 14, 2014

This is a maintenance release of PetraSim. This version increases the number of cells that can be used in simulations, adds support for cell-by-cell porosity, adds support for well data import, and includes several important bug fixes for TMVOC.


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.