News

Simulation of Premixed Flames with FDS – Application to the Hot Smoke Testing System Izar

September 23, 2018
The use of premixed flames in hot smoke tests present valuable advantages in comparison with traditional methods. The definition and control of the necessary power, HRR, is a great challenge due to the lack of information about the plumes originated by premixed flames. This work presents a method to simulate the hot smoke testing system Izar in FDS an calculate the temperature field within the created plume. Read More...

FEMTC 2018 Early Registration Discount Ends Soon

August 10, 2018
Register for FEMTC 2018 before August 15th, 2018 and save $100. Read More...

Ramps in Pathfinder

August 10, 2018
This post demonstrates how to use straight and curved ramps in Pathfinder. Straight ramps are supported using the Create Ramp tool, while curved ramps require CAD import and use of the Extract Floor tool.  Read More...

New Camera Options in Results Viewer

August 6, 2018
Views, Tours, and Section Boxes can now be created directly within the Results Viewer. These objects can be trasnferred from one set of results to another via import. Also, screenshots can be automatically generated based on the views and tours that are created. Read More...

PyroSim 2018.2.0730

July 30, 2018
This release includes support for complex reaction stoichiometry, improved support for graphics hardware, and bug fixes. Changes to Results include creating views and section boxes, unit switching for concentration and temperature, and many other improvements. Read More...

Pathfinder 2018.3.0730

July 30, 2018
This release includes wait times on doors, an option for occupants to shrink to move through narrow aisles, and console-based generation of randomized simulations. Changes to Results include creating views and section boxes, unit switching for concentration and temperature, and many other improvements. Read More...

Changes to our Email System

July 14, 2018
If you would like to receive email messages from Thunderhead Engineering, please use the subscription form on this page. https://www.thunderheadeng.com/subscribe/ As individuals and as an organization we cringe at the idea of SPAM and sending people information that they do not want to look at. Which is why the new system has improved unsubscribe capabilities to ... Read More...

Experimental Study the Impact of Visibility on Individual Ascent Speed in Stair

July 13, 2018
An experiment was conducted in a 20-level building, where 120 participants were asked to walk upward in the stair in four kinds of visibility conditions (i.e., normal visibility condition, lighting-out condition, the condition of wearing 27% transmittance eye-patch and the condition of wearing 16% transmittance eye-patch). Their upward movement, ascent speeds and behaviors were recorded by cameras. Read More...

Mesh Techniques And Uncertainty For Modelling Impulse Jetfans

July 12, 2018
This study presents the numerical modelling of a jetfan stream using an open source Computational Fluid Dynamics (CFD) software named Fire Dynamics Simulator (FDS) 6.5.2. The software is based on an accurate turbulence model named Large Eddy Simulation (LES) along with a structured mesh to discretize the numerical domain. This research is focussed on the feasibility and accuracy of modelling jetfans using FDS, where a simplified three-dimensional model is built to represent a single jetfan in an open-deck car park, to compare the air jet downstream of the jetfan using various mesh techniques. Read More...

Use of Evacuation Simulation to Develop a Disaster Management Plan in Super Tall Buildings

July 12, 2018
This disaster management planning approach has been applied in a 123 stories super tall building located in Seoul, Korea. The purpose of this paper is to provide an overview of Pathfinder simulation application and propose a creative utilization to develop a disaster management plan in a super tall building project. Read More...