Simulation Software for Science and Engineering

Thunderhead Engineering

Manage Geometry, Specify Parameters, Deliver Results

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PyroSim

PyroSim

Fire & Smoke
Analyze fire control and smoke dissipation in various structures for fire protection and safety or investigation.
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Pathfinder

Pathfinder

Evacuation
Understand pedestrian egress and congestion hazards for fire protection and safety or urban planning.
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PetraSim

PetraSim

Subsurface Flow
Model nonisothermal multiphase flow and transport in fractured and porous media for environmental engineering.
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Recent News and Announcements

Keep up to date on our products, training and events.

2023.1.0524 Version Updates - Available Now

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.

2023.1 pathfinder pyrosim release results

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Create general purpose elevators for ingress modeling

Now in Pathfinder 2023.1 it is possible to create a new type of elevator which suits general-purpose needs. Previously, it was only possible to model elevators in an evacuation mode which de ...

2023.1 pathfinder release

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Early access for Ventus, built with CONTAM

Ventus uses CONTAM from NIST to provide pressurization simulation for smoke control analysis in a 3D interface. In anticipation of a late 2023 official release, Ventus has entered private ea ...

ventus

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2023.1 Version Updates - Available Now

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.

2023.1 pathfinder pyrosim release results

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Increased interface consistency in 2023.1

PyroSim, Pathfinder, and Results will soon all look more similar to each other. For the upcoming release, we have prioritized resolving many differences between these applications and how us ...

2023.1 pathfinder pyrosim release

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New training platform available

Our new training platform which currently hosts the Fundamentals series is new available. These tutorial series provide core education material in a self-paced online module format for our m ...

pathfinder pyrosim results training

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