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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. 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...

Evacuation Conditions In A Subway Stations With Platform Screen Doors

July 6, 2018
The aim of the paper is to carry out a comparison with and without platform screen doors in terms of evacuation conditions during a fire event. This way, it is possible to quantify and compare visibility, temperature, CO concentration and other variables in the evacuation routes. Read More...
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