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Publication Citation: Measurement and Numerical Prediction of Homogeneous Turbulent Flow Over a Cylinder: A Baseline for Droplet-Laden Flow Studies

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Author(s): Cary Presser; J F. Widmann; P E. DesJardin; L A. Gritzo;
Title: Measurement and Numerical Prediction of Homogeneous Turbulent Flow Over a Cylinder: A Baseline for Droplet-Laden Flow Studies
Published: January 01, 2002
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. Comparison of numerical predictions to the 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 that are of interest in practical agent delivery systems.
Conference: 40th Aerospace Sciences Meeting and Exhibit
Proceedings: AIAA 40th Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Dates: January 14-17, 2002
Keywords: computational fluid dynamics;computational fluid dynamics;droplet transport;fire simulation code;fire suppression;grid-generated turbulence;particle imaging velocimetry
Research Areas: Chemistry