Simulation Software for Science and Engineering

Manage Geometry, Specify Parameters, Deliver Results


PyroSim Fire & Smoke

Analyze fire control and smoke dissipation in various structures for fire protection and safety or investigation. Read More »

Pathfinder Evacuation

Understand pedestrian egress and congestion hazards for fire protection and safety or urban planning. Read More »

PetraSim Subsurface Flow

Model nonisothermal multiphase flow and transport in fractured and porous media for environmental engineering. Read More »


FEMTC 2022 Abstracts are Confirmed

June 14, 2022
FEMTC 2022 event and hotel registration is now live. After closing the call for papers, we have reviewed, accepted, and confirmed over 30 presenters for FEMTC 2022 in Brno, Czech Republic and online for virtual attendees. More than 25 presenters will attend in-person at Brno while the remaining presenters will provide a virtual appearance. Read More...

2022.1 Version Updates – Available Now

April 13, 2022
The latest updates for PyroSim, Pathfinder and Results are available now. View our Release Notes to download and see the full details, or read on for a quick look at what's new. Read More...

Mesh Assignment is Overhauled in PyroSim 2022.1

April 11, 2022
PyroSim 2022.1 will release this week with several new features. One that we'll highlight today is the new mesh assignment optimization algorithm. When a model is designed with multiple meshes, they are assigned to separate cores for simulation. This parallel process helps reduce the total time needed. When there are more meshes than processors, an algorithm is used to determine an efficient pairing. Read More...

New Preferences for Snapshot Defaults

March 30, 2022
Pathfinder 2022.1, the first release of the year, will soon launch with a new minor feature which provides an option to enable or disable simulation snapshots from the Preferences menu. Read More...

A Brief History of FEMTC

March 28, 2022
FEMTC, the Fire and Evacuation Modeling Technical Conference, began in 2011. Thunderhead Engineering noticed a lack of modeling-specific events in the industry and wanted to provide an opportunity for the community to share its progress with one another. It was always designed to highlight achievements through application, research, and experimentation. At that inagural event, Thunderhead Engineering co-founder Dan Swenson introduced the event and expressed its intent which has not changed. Read More...
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