Characterization of Turbulent Flow in a Flume with Surfactant

[+] Author and Article Information
Roi Gurka

Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD, USA e-mail: gurka@pegasus.me.jhu.edu

Alex Liberzon

Institute of Hydromechanics and Water Resources Management, ETH, Zurich e-mail: liberzon@ihw.baug.ethz.ch

Gad Hetsroni

Multiphase Flow Laboratory, Department of Mechanical Engineering, Technion, Haifa, 32000, Israel e-mail: hetsroni@tx.technion.ac.il

J. Fluids Eng 126(6), 1054-1057 (Mar 11, 2005) (4 pages) doi:10.1115/1.1845511 History: Received January 13, 2003; Revised July 27, 2004; Online March 11, 2005

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Schematic drawing of the experimental facility
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Schematic view of the PIV configuration and the optical setup
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The fluctuating velocity field in the streamwise-spanwise plane of the water flow (left) and the flow with surfactant (right). The gray scale represents the values of the streamwise velocity fluctuations in cm s−1 (i.e., −1≤u≤1 cm s−1)
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PDF’s of the urms/Uq for water (circles) and surfactant (squares). urms(x,z)=〈(u(x,z)−〈u(x,z)〉)2〉 and the PDF is representing the spatial distribution of the rms values, normalized by the flow-rate velocity Uq.
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Two-point (auto)correlation function Ruu of the streamwise velocity along the streamwise x and spanwise z coordinates, for water (circles and plus symbols) and for surfactant (square and triangular markers), respectively.




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