Support for EOS7C Added

October 12, 2012
PetraSim now supports EOS7C, a TOUGH2 module for methane-carbon dioxide or methane-nitrogen gas mixtures. Applications include subsurface geologic carbon sequestration sites and natural gas reservoirs. The components modeled include water, brine, non-condensible gas (CO2 or N2), gas tracer, methane, and heat. If you want to be a beta tester, please contact Alison Alcott at RockWare (  Read More...

Create Spiral Stairs

August 21, 2012
This is a short video tutorial demonstrating a process that may be used to make circular or spiral stairs in Pathfinder. Read More...

PyroSim: ATF engineering analysis of a fire scenario resulting in a firefighter fatality.

July 20, 2012

The video below presents the ATF Fire Research Laboratory’s Engineering Analysis of the fire that occurred at 30 Dowling Circle on January 19th, 2011. ATF Fire Protection Engineers were asked to utilize engineering analysis methods, including computer fire modeling, to assist with determining the route of fire spread and the events that led to the firefighter MAYDAY and subsequent Line of Duty Death of Firefighter Mark Falkenhan.


PetraSim 5.2.0611

June 11, 2012

This is a maintenance release of PetraSim 5. This version includes changes to the selection model and bug fixes to improve stability.


Water Spray Interaction with Dense Gas Clouds

May 7, 2012

Submission by: Robert N. Meroney, PhD. Wind Engineering Software, and Civil and Environmental Engineering, Colorado State University, Fort Collins, CO., USA

Water spray curtains can provide an effective and rapid dilution mechanism for low lying dense clouds.  Frequently such clouds are released as a result of a chemical manufacturing, storage or gas transportation accident.

Extensive field and laboratory tests have been performed to determine how well water curtains can mitigate actual spill conditions.  Numerical methods are often proposed to provide system design or timely response information, but most of these models reduce mathematical and computational complexity by integrating the equations of motion over volumes, sections or depths which provides computational speed but often sacrifices mixing detail and typically presume the use of empirical entrainment relationships.


PyroSim 2012 Development Underway

December 8, 2011
Work is underway on the next version of PyroSim — PyroSim 2012. The release date is tentatively scheduled for some time in March 2012. The major noteworthy features are: Support for FDS 6 Improved tools for drawing and editing geometry Support for HVAC network modeling in FDS Improved CAD file import, including DWG format files Automatic partitioning of meshes for ... Read More...

PetraSim 5.1.2030

August 30, 2011

This release includes a workaround for a bug in the way TOUGH2’s EOS9 module processes the ROCKS card when searching for REFCO.


PetraSim 5.1.1928

July 28, 2011

This release includes several bug fixes and enhancements for the PetraSim user interface.


Import FDS Geometry

July 10, 2011
Download the and follow the guide . 

Extract Rooms from a 2D DXF File

July 10, 2011
Download the and follow the guide .