fire modeling Articles | Environmental XPRT

A new feature of MFIRE: the moving fire simulation

MFIRE, a mine fire simulation program, is a very useful tool for fire prevention planning, fire control, and training in underground mines. However, all of its fire source models are stationary, which are incapable of simulating a moving fire such as a conveyor belt fire. In this paper, a moving fire source model which can be used to represent a conveyor belt fire is defined and incorporated into ...

Sep. 12, 2011

By Inderscience Publishers

Evaluation of CFD Modeling Methods for Fire-induced Airflow in a Room

Methods for exploiting the technique of computational fluid dynamics (CFD) to model fires and the associated fundamental processes of combustion and radiation are appraised by applying the CFD model JASMINE to simulate the fire-induced airflow in a room-sized compartment. For a systematic evaluation of these methods describing the fundamental processes and the associated mathematical formulation, ...

Sep. 1, 2006

By SAGE Publications Ltd

Flameproofing

The prospect of a major fire onboard a nuclear submarine is almost unthink- able (see inset). One approach to managing this potent hazard in multi-compartment spaces is to model the fire progression using computer codes based upon three dimensional computational fluid dynamics (CFD). Unfortunately, this can be time consuming and expensive, and is only as good as the model definition. Moreover, ...

Jul. 1, 2008

By Risktec Solutions

Analysis of fire behaviour simulations over Spain with WRF-FIRE

Wildland fire spread and behaviour are complex phenomena owing to both the number of involved physico-chemical factors, and the non-linear relationship between variables. Spain is plagued by forest and brush fires every summer, when the extremely dry weather sets in along with high temperatures. The use of fire behaviour models requires the availability of high resolution environmental and fuel ...

Dec. 1, 2014

By Inderscience Publishers

Gypsum Board in Fire — Modeling and Experimental Validation

The thermal behavior of a commercially widespread gypsum board (810 kg/m 3) under fire condition has been investigated. For this purpose two 12 mm thick gypsum boards are subjected to the standard fire ISO 834 and the temperature distribution within them is measured by means of thermocouples placed at different depths in the samples. The results hereof are used to validate a numerical model based ...

May 1, 2007

By SAGE Publications Ltd

Transient Ceiling Jet Temperature and Velocity Profiles in the Presence of an Upper Layer: Comparison with Predictions by LAVENT and JET Computer Fire Models

Results of a scaled experimental study are compared with the predictions produced by the LAVENT and JET computer fire models. As in most large-scale fire testing, characterization of heat release rate (HRR) and accuracy of its measurement creates a lot of uncertainty for validation of these codes. Sensitivity of LAVENT results to the assumed radiative loss of 35% is examined by varying the total ...

Mar. 1, 2008

By SAGE Publications Ltd

Transfer of Architectural Data from the IFC Building Product Model to a Fire Simulation Software Tool

A standardized, object-oriented building product model for buildings is introduced that can be used as a means of electronic exchange between various software tools. The ability to transfer architectural data between a commercially available computer-aided design (CAD) program and a widely available zone fire simulation tool illustrates the applicability of this model in fire engineering. This ...

Nov. 1, 2007

By SAGE Publications Ltd

Performance Comparison of Zone Models with Compartment Fire Tests

Prediction accuracy of zone models is attributed to the sophistication of the mathematical model, as well as the numerical methods applied in their implementation. Well-known zone models CFAST and OZone have gained world-wide acceptance among the fire engineering community in predicting enclosure fire dynamics. Despite these models serving similar purpose, the level of accuracy and applicability ...

Jul. 1, 2007

By SAGE Publications Ltd

Tunnel fire smoke modelling for emergency management

The current paper describes the investigation of parameters related to accidents in tunnels in the framework of the "Advanced Training System for Emergency Management" project, A-TEAM. On this basis, the flow field is investigated within tunnels, and its effects on fire development and smoke concentration fields for these emergency cases are reconstructed. This is achieved with the use ...

Feb. 3, 2004

By Inderscience Publishers

Prediction of Fire Growth for Compartments of Office Buildings as Part of a Fire Risk/Cost Assessment Model

This article presents a zone model for the prediction of fire growth in a commercial compartment of an office building as part of a fire risk and cost assessment software package. The model developed is a combination of a transient, two-zone submodel used for the pre-flashover fire state and a quasi-steady, single-zone submodel for the post-flashover state. In the two-zone submodel, the selected ...

Aug. 1, 2007

By SAGE Publications Ltd

Influence of some meteorological parameters and forest fires on PM10 concentrations in a southwest zone of Mexico Valley

The relationship between PM10 concentrations and some meteorological parameters was analysed. Sampling was made from January (1998) to June (2001) in the campus of the National Autonomous University of Mexico (UNAM) at the southwestern part of the Mexico Valley. Year 1998 had extensive forest fires. A linear multivariate model was constructed. The model's adequacy to extrapolate daily average ...

Mar. 3, 2006

By Inderscience Publishers

A Numerical Study of Firebrands Scattering in Urban Fire Based on CFD and Firebrands Aerodynamics Measurements

Firebrands are found to be an important factor in the spread of large urban fire. In this study, in order to predict the scattering of firebrands in an urban fire, a computational fluid dynamics (CFD), turbulent combustion model, radiation model, and firebrand scattering model are coupled and it is validated by a fire wind tunnel experiment. The density, terminal velocity, and Stokes diameters of ...

Jul. 1, 2007

By SAGE Publications Ltd

Evaluation of forest fire risk and fire extinction difficulty at the mountainous park of Vikos-Aoos, Northern Greece: use of remote sensing and GIS techniques

In this study the potential of satellite remote sensing coupled with Geographical Information Systems (GIS) for the assessment of fire risk in and around the National Park of Vikos-Aoos, a mountainous area in Northern Greece, is examined. In order for this to be accomplished, recent satellite images of varying spatial resolutions (from 5–30 m) have been selected for processing, whereas satellite ...

Mar. 30, 2005

By Inderscience Publishers

Emergency management and decision making on accident scenes: taxonomy, models and future research

An effective emergency management is often connected with the goals achieved in the response activities. However, it is not clear as to which subsequent factors contribute to whether the emergency management should be regarded as a success or not. One factor, the on-scene commanding structure, and the on-scene commander in particular, plays an important role in fighting emerging crises. Dynamic ...

May 11, 2004

By Inderscience Publishers

Vent Flows in Fire Compartments with Large Openings

The Kawagoe vent flow model has been widely used to study fully developed compartment fires. It is well known that the Kawagoe model is only adequate for compartments with relatively small openings because it overestimates the vent flow rates for compartments with large openings. For a compartment with a very wide opening occupying a large fraction of one wall, experimental observations show that ...

Aug. 1, 2007

By SAGE Publications Ltd

Comparison of random vibration responses between traditional model and coupled model for a road-rail fire fighting vehicle

Based on the vehicle-track coupled dynamics, a vehicle-track coupled model for the road-rail fire fighting vehicle is set up. The random vibration characteristics of the vehicle-track coupled model are compared with those of the traditional vehicle model regarding the track as a rigid foundation. Some field measures are done to verify the two models. The experimental test results and the numeral ...

Sep. 12, 2011

By Inderscience Publishers

Estimation of postfire nutrient loss in the Florida everglades

Postfire nutrient release into ecosystem via plant ash is critical to the understanding of fire impacts on the environment. Factors determining a postfire nutrient budget are prefire nutrient content in the combustible biomass, burn temperature, and the amount of combustible biomass. Our objective was to quantitatively describe the relationships between nutrient losses (or concentrations in ash) ...

Aug. 28, 2008

By Soil Science Society of America (SSSA)

Influence of Draft Curtains on Sprinkler Activation — Comparison of Three Different Models

This article investigates the importance of using draft curtains to obtain faster sprinkler activation with three different models-two computational fluid dynamics (CFD) models (CFX 4.4 and fire dynamics simulator (FDS) 4.07) and a zone model (Argos) containing a ceiling-jet formula - for an actual scenario in an entertainment center in Denmark. It is found that a draft curtain has some effect on ...

Feb. 1, 2008

By SAGE Publications Ltd

What are the reasons for frequent electric vehicle fires?

In recent years, electric vehicles have become more and more popular, but electric vehicle accidents have occurred more and more frequently. Therefore, we need to know why the charging of electric vehicles will suddenly catch fire or explode? In fact, there are several main reasons: 1. Electric vehicles use lithium batteries, which is produced by unknown battery factory with poor quality. In ...

Jun. 5, 2020

By Guangdong Bell Experiment Equipment Co., Ltd

Modelling dispersion of smoke from wildfires in a Mediterranean area

We present a modelling system for the estimation of forest fire emissions ( prebolchem-fire ) and their inclusion in the atmospheric composition model BOLCHEM. Emission fluxes have been estimated following the methodology proposed by Seiler and Crutzen (1980) and using MODIS ‘burned area product’. Then they are modulated following the WRAP approach (WRAP, 2005). This approach is also used for ...

Dec. 1, 2014

By Inderscience Publishers