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Publication Citation: Measurements and Numerical Predictions of Liquid Agent Dispersal Around Solid Obstacles

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Author(s): Cary Presser; J F. Widmann; P E. DesJardin; L A. Gritzo;
Title: Measurements and Numerical Predictions of Liquid Agent Dispersal Around Solid Obstacles
Published: April 01, 2001
Abstract: The focus of this effort is to investigate the dispersal of liquid agents around solid obstacles, and obtain a better understanding of the physical processes of droplet transport in cluttered spaces. A combined experimental-numerical study is presented to examine the flow field dynamics of highly turbulent flow over obstacles, and spray transport in such flow fields. Comparison of numerical predictions to the Particle imaging velocimetry (PIV) measurements shows good qualitative agreement in spatial distribution of the mean and RMS velocities with a 20 % overprediction in mean streamwise velocity and 15 % underprediction in RMS. A numerical sensitivity study using HFE-7100 agent reveals a strong dependency of droplet penetration on initial droplet size for the flow range and droplet sizes of interest in practical agent delivery systems.
Conference: Halon Options Technical Working Conference
Proceedings: Halon Options Technical Working Conference |||HOTWC
Dates: April 24-26, 2001
Keywords: computational fluid dynamics;droplet transport;fire simulation code;fire suppression;grid-generated turbulence;model validation;particle imaging velocimetry
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