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Direct Numerical Simulation of Turbulent Flow and Mass Transfer Around a Rotating Circular Cylinder

[+] Author Affiliations
Jong-Yeon Hwang, Kyung-Soo Yang

Inha University, Incheon, Korea

Klaus Bremhorst

University of Queensland, Brisbane, QLD, Australia

Paper No. FEDSM2005-77401, pp. 347-352; 6 pages
doi:10.1115/FEDSM2005-77401
From:
  • ASME 2005 Fluids Engineering Division Summer Meeting
  • Volume 2: Fora
  • Houston, Texas, USA, June 19–23, 2005
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4199-5 | eISBN: 0-7918-3760-2
  • Copyright © 2005 by ASME

abstract

Characteristics of turbulent flow and mass transfer around a rotating circular cylinder are investigated by Direct Numerical Simulation. Mass-transfer results are presented at a high Schmidt number (Sc = 1670). The concentration field is computed for three different cases of low Reynolds number, Re*R = 161, 348 and 623, based on the cylinder radius and friction velocity. Results confirm that the thickness of Nernst diffusion layer is very small compared with that of viscous sub-layer in the case of high Sc mass transfer. A strong correlation of the concentration field with streamwise and vertical velocity components is noticed. However, that is not the case with the spanwise velocity component. Visualization of instantaneous concentration reveals that the length scale of concentration fluctuation typically decreases as Reynolds number increases. The correlation between Sherwood number and Reynolds number is consistent with other experiments currently available.

Copyright © 2005 by ASME

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