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Simulation of Two-Phase Flow Past a Vertical Surface-Piercing Circular Cylinder

[+] Author Affiliations
Frederick Stern, Jianming Yang, Jungsoo Suh, Bonguk Koo

University of Iowa, Iowa City, IA

Paper No. FEDSM-ICNMM2010-30102, pp. 435-445; 11 pages
doi:10.1115/FEDSM-ICNMM2010-30102
From:
  • ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2010 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration and Noise: Volume 3, Parts A and B
  • Montreal, Quebec, Canada, August 1–5, 2010
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5451-8 | eISBN: 978-0-7918-3880-8
  • Copyright © 2010 by ASME

abstract

Large-eddy simulation of the flow past a surface-piercing circular cylinder is performed to investigate the effects of Reynolds and Froude numbers using a high fidelity orthogonal curvilinear grid solver. The present study extends and supports the conclusions of the precursory work for medium Reynolds and Froude numbers. Organized periodic vortex shedding is observed in deep flow. At the interface, the organized periodic vortex shedding is attenuated and replaced by small-scale vortices. The streamwise vorticity and outward transverse velocity generated at the edge of the separated region cause the weakened vortex shedding at the interface. The main source of the streamwise vorticity and the outward transverse velocity at the interface is the lateral gradient of the difference between the vertical and transverse Reynolds normal stresses.

Copyright © 2010 by ASME

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