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Turbulence Modulation in an Initially Quiescent Two-Phase Flow at High Volume Fractions Using Stereoscopic PIV

[+] Author Affiliations
N. R. Stoddard, C. D. Richards, C. T. Crowe, T. R. Troutt

Washington State University, Pullman, WA

Paper No. FEDSM2003-45212, pp. 2309-2320; 12 pages
doi:10.1115/FEDSM2003-45212
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

Turbulence data for 5 mm solid, spherical particles falling at terminal velocity through an initially quiescent vertical water channel are obtained using a Scheimpflüg stereo-PIV system. The system was successfully implemented into the flow facility and optimized to provide 3-D velocity field information for volume fractions at 2.71% and 5.24%. Vector validation played a significant role in reducing the data to obtain turbulence intensities as a function of particle fall time. The system was shown to be capable of measuring in-plane and out-of-plane displacements (velocities) with an error of less than 0.6%, despite blockage effects by the particles and inherent experimental errors. Since similar data in current literature is sparse, a popular length-scale model is provided in support of the data.

Copyright © 2003 by ASME

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