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Influence of Bubbles on the Turbulence Anisotropy

[+] Author Affiliations
Igor A. Bolotnov

North Carolina State University, Raleigh, NC

Paper No. FEDSM2012-72412, pp. 695-702; 8 pages
doi:10.1115/FEDSM2012-72412
From:
  • ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
  • Volume 1: Symposia, Parts A and B
  • Rio Grande, Puerto Rico, USA, July 8–12, 2012
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4475-5
  • Copyright © 2012 by ASME

abstract

Direct numerical simulations (DNS) with interface tracking of turbulent bubbly flows are becoming a major tool in advancing our knowledge in the multiphase modeling research area. Comprehensive analysis of turbulent flow structure allows to evaluate the state-of-the-art computational multiphase fluid dynamics (CMFD) models and to propose new closure laws.

The presented research will demonstrate how the multiphase DNS data can inform the development of computational fluid dynamics (CFD) models. In particular, Reynolds stress distribution will be evaluated for single and two-phase bubbly flows and the level of turbulence anisotropy will be measured in several scenarios. The results will help determine if the isotropic turbulent models are suitable for bubbly flow applications or there is a strong need to apply and develop Reynolds-stress turbulent models for two-phase flow CFD modeling.

Copyright © 2012 by ASME

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