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Measurements and Numerical Predictions of Liquid Agent Dispersal Around Solid Obstacles

Published

Author(s)

Cary Presser, J F. Widmann, P E. DesJardin, L A. Gritzo

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.
Proceedings Title
Halon Options Technical Working Conference |||HOTWC
Conference Dates
April 24-26, 2001
Conference Title
Halon Options Technical Working Conference

Keywords

computational fluid dynamics, droplet transport, fire simulation code, fire suppression, grid-generated turbulence, model validation, particle imaging velocimetry

Citation

Presser, C. , Widmann, J. , DesJardin, P. and Gritzo, L. (2001), Measurements and Numerical Predictions of Liquid Agent Dispersal Around Solid Obstacles, Halon Options Technical Working Conference |||HOTWC (Accessed October 6, 2022)
Created April 1, 2001, Updated February 17, 2017