Modeling Jet Fans, Part 2 (now replaced by new post): An Engineering Approach

March 16, 2015
It is not feasible to simulate full scale parking garages with such a fine mesh, even if multiple meshes are used. This post discusses ways it may be possible to use a larger mesh size and still obtain meaningful results. Read More...

PetraSim – How we extract a surface from a set of XYZ points

March 3, 2015
In the latest release of PetraSim we have improved the method we use to extract a fault surface from a set of XYZ points. The challenge is that we know the points are on the surface, but we do not know how the points are connected to define the surface.  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...

PetraSim 2015.1.0225

February 25, 2015
This release of PetraSim improves support for Petrel geometry, HydrateResSim, and import of vertical internal boundaries. 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...

Modeling Jet Fans, Part 1: Background and Convergence Study

February 17, 2015
This post discusses modeling jet fans using FDS/PyroSim, with the eventual goal of modeling parking garages. It starts with some background information that was useful to me in helping me understand the problem. Read More...

Pathfinder: Contour Plots and Density Calculation

February 3, 2015
Our next Pathfinder release will include color contour plots that allow you to dynamically display contoured data such as density or times remaining to exit. Read More...

PyroSim 2015.1.0130

January 29, 2015

This update of PyroSim fixes issues with device settings being erased when closing models, as well as other common bugs.

PetraSim 2015.1.0122

January 22, 2015

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

This version of PetraSim uses version 1.8.0_05 of the JavaVM.


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...