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A Fundamental Assessment of the Concept of Mean Beam Length for Application for Multi-dimensional Non-Gray Radiative Heat Transfer

May 9, 2022

Author(s)

Walter W. Yuen, Wai Cheong Tam

The traditional concept of mean beam length (MBL) and its recommended empirical expression is demonstrated to be inaccurate for general application for the evaluation of multi-dimensional non-gray radiative heat transfer. A new concept, namely Point Mean

Development of a Flashover Prediction Model for Compartment Fires Using Support Vector Regression

April 1, 2022

Author(s)

Wai Cheong Tam, Jun Wang, Richard D. Peacock, Paul A. Reneke, Eugene Yujun Fu, Thomas Cleary

This report provides additional technical details to an article entitled P-Flash – A Machine Learning-based Model for Flashover Prediction using Recovered Temperature Data. Research was conducted to examine the use of Support Vector Regression (SVR) to

Current and Future Parameters Used by FDS

December 15, 2021

Author(s)

Kevin B. McGrattan, Jason Floyd

This paper discusses important input parameters used by the Fire Dynamics Simulator (FDS), a computational fluid dynamics (CFD) model of fire. Suggestions are made for new or enhanced sub-models and measurements specifically for CFD models of fire.

The MaCFP Condensed Phase Working Group: A Structured, Global Effort Towards Pyrolysis Model Development

November 23, 2021

Author(s)

Isaac Leventon, Benjamin Batiot, Morgan Bruns, Simo Hostikka, Yuji Nakamura, Pedro Reszka, Thomas Rogaume, Stanislav Stoliarov

The International Association for Fire Safety Science (IAFSS) Working Group on Measurement and Computation of Fire Phenomena (i.e., the MaCFP Working Group) has been established as a global collaborative effort between experimentalists and modelers in the

Preliminary Summary of Experimental Measurements Submitted to the 2021 MaCFP Condensed Phase Workshop

September 30, 2021

Author(s)

Isaac Leventon

This report summarizes the experimental measurements submitted to the 2021 Condensed Phase MaCFP Workshop. Measurements from approximately 200 experiments were submitted by 16 unique institutions across 10 countries. This report contains: 1. Brief

Validation of Aerosol Dynamics in a Well-Stirred Isothermal Enclosure

September 30, 2021

Author(s)

Amy Mensch, Thomas Cleary

Modeling of aerosol dynamics in fire simulations enables predictions of the effects of soot, such as visibility and detection, and the fate of soot, such as deposition and emissions. NIST's fire modeling tool, Fire Dynamics Simulator (FDS), has implemented

A calibration and sampling technique for quantifying the chemical structure in fires using GC/MSD analysis

September 23, 2021

Author(s)

Ryan Falkenstein-Smith, Kimberly Harris, Kunhyuk Sung, Tianshui Liang, Anthony Hamins

This work presents an approach to measure, calibrate, and verify local concentrations of combustion products in pool fires steadily burning in a quiescent environment. This study describes a method that can be used to measure and verify the chemical

CFAST - Consolidated Fire and Smoke Transport (Version 7) Volume 5: CFAST Fire Data Generator (CData)

June 11, 2021

Author(s)

Paul A. Reneke, Richard D. Peacock, Stanley W. Gilbert, Thomas Cleary

This document provides documentation for creating and running Monte Carlo simulations with the Consolidated Fire And Smoke Transport (CFAST) model using the CFAST Fire Data Generator (CData). The method follows the general framework set forth in the '

A Study on Experimental Tests and Numerical Simulations of Boeing 747 Overhead Inaccessible-Area Fires

March 19, 2021

Author(s)

Haiqing Guo, Marcos Vanella, Richard Lyon, Randall J. McDermott, Sean Crowley, Paul Scrofani

Hidden fire in an aircraft overhead inaccessible-area is hazardous to in-flight safety and could lead to catastrophic disaster. In this case, fire detection at the earliest stage requires an improved understanding of the heat and mass transfer in overhead

Experimental Study of the Effect of Ambient Pressure on Oscillating Behavior of Pool Fires

December 4, 2020

Author(s)

Jian Chen, Andy Tam, Wei Tang, Chao Zhang, Changhai Li, Shouxiang Lu

Pool fires are known to exhibit self-sustained oscillatory behavior, which plays an important role in the understanding of flame and fire spreading. To investigate the effect of ambient pressure on oscillating behavior of pool fires, the ethanol pool fires

Point Mean Beam Length - a New Concept to Enhance the Computational Efficiency of Multi- Dimensional Non-Gray Radiative Heat Transfer

December 3, 2020

Author(s)

Walter W. Yuen, Andy Tam

A new concept of point mean beam length (PMBL) is introduced. For enclosures with simple geometry, this concept provides a fundamental self-consistent interpretation on the various different definition of the conventional mean beam length. The concept is

Mixture Fraction Analysis of Combustion Products in Medium-Scale Pool Fires

November 13, 2020

Author(s)

Ryan Falkenstein-Smith, Kunhyuk Sung, Jian Chen, Anthony Hamins

A mixture fraction analysis is performed to investigate the characteristics of time-averaged gaseous species measurements made along the centerline of medium-scale pool fires steadily burning in a quiescent environment. A series of fire experiments are

Smoldering Propensity in Upholstered Furniture: Effects of Mockup Configuration and Foam Thickness

August 20, 2020

Author(s)

Jiuling Yang, Guillermo Rein, Haixiang Chen, Mauro Zammarano

Reduced-scale mock-ups had been developed to assess and regulate smoldering ignition resistance of residential upholstered furniture (RUF). However, there are limited data available on the effects of the mock-up test configuration and foam thickness on