News

Exploring Unstructured Poisson Solvers for FDS

July 11, 2017
The paper and its associated talk are intended to give some insights into the current state of development and to compare the pros and cons of the different Poisson approaches with respect to their ef´Čüciency and accuracy. Read More...

Implementing Assisted Evacuation and Integrated Fire Model Results in Pathfinder and PyroSim

June 20, 2017
This presentation provides an update of recent developments in PyroSim and Pathfinder, including improvements in model and results rendering, integrated fire results visualization, and new behaviors for assisted evacuation modeling. Read More...

Tenability Criteria In Unique Situations And Atypical Buildings

June 20, 2017
This presentation will look at tenability in atypical buildings such as prisons and enclosed amusement rides. This includes how increased exposure times, due to code changes and unique building applications, effect applicable tenability criteria. The basis for the presentation includes case studies and criteria that has been used in prisons throughout the United States of America and amusement parks throughout the world. Read More...

A Research Roadmap For Evacuation Models Used In Fire Safety Engineering

June 20, 2017
This paper wants to open a discussion on a research roadmap for evacuation models used in fire safety engineering. In other words, this paper explores what features need to be possibly implemented, improved, or expanded in existing evacuation models for fire safety engineering applications. Read More...

Smoke Visibility and Obscuration in PyroSim

June 19, 2017
Smoke visibility and obscuration are critical outputs of a fire simulation. This post reviews how visibility is calculated in FDS, compares the calculation to experimental data, and discusses how smoke is visualized in the new PyroSim Results Viewer and in Smokeview. The comparison of VTT experimental images with predicted smoke visualization using PyroSim/FDS shows remarkably good correlation.   Read More...

The Use Of Pathfinder As An Evacuation Planning Tool: A Case Study In Concert Halls

June 12, 2017
Evacuation planning as part of fire safety management, is mandatory in Portugal for new and existing buildings. Estimating the egress time is paramount for the development of emergency evacuation plans. For this estimation, fire drills are undertaken. However, carrying out fire drills demands a certain amount of time and financial resources. In addition to that, fire drills might not be realistic for the worst case scenarios, such as having one or more exits blocked due to fires, or when other types of emergency situations are considered such as earthquakes or even terrorist attacks. For these reasons, a robust and validated People Movement (PM) model, such as Pathfinder, can be a very useful tool for emergency evacuation planning. Read More...

Study Of The Parameters That Influence The Behavior Of I-Girder Bridges During Fire Events

June 6, 2017
The structural response of bridges against fire is an under-researched topic not covered in current design codes in spite of its frequency and consequences. This paper uses Computational Fluid Dynamics simulations to study the parameters influencing the temperatures in the gas surrounding I-girder bridges during a fire since this is a critical parameter governing the response of the bridge. Read More...

A Comparative Study Of Fire Safety Provisions Effecting Evacuation Safety In A Metro Tunnel

May 23, 2017
This paper utilizes Computational Fluid Dynamics (CFD) and evacuation modeling to compare different evacuation configurations in a metro rail tunnel. Read More...

Stochastic Analysis Of Egress Simulations

May 19, 2017
The use of egress simulation models in performance-based analysis relies on the confidence in the input and output data. These data strongly depend on a large number of parameters. The study presented here focuses on the statistical aspects of these data, especially the population behavioral parameters which are the most likely to be scattered. The study proposes a method to analyze the statistical aspects of an egress simulation model. Read More...

Performance Of Optimization Algorithms For Deriving Material Data From Bench Scale Tests

May 17, 2017
In this work the performance of optimization algorithms for inferring material parameters for fire modeling from bench scale tests is compared to each other. Read More...