DNS of droplet-vortex interaction with a Karman vortex street

M. Burger, R. Schmehl, Rainer Koch, S. Wittig, H. J. Bauer

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

Predicting fuel spray interaction with large scale vortex structures still is a major challenge for state-of-the-art CFD codes. In order to elucidate the mechanisms involved, a fundamental study has been carried out in which the interaction of water droplets with a Karman vortex street is investigated. The disperse two-phase flow around a cylinder has been computed taking into account the mass, momentum and heat transfer between both phases. Flow conditions are chosen such that large scale vortices are generated by periodic flow separations of the well known Karman vortex street. A homogeneous distribution of water droplets is injected into the hot air up-stream of the computational domain. The mixing process as well as the impact of the droplets on the gas phase instabilities is analyzed in the downstream region where large scale vortex structures are present.

Original languageEnglish
Pages (from-to)181-191
Number of pages11
JournalInternational Journal of Heat and Fluid Flow
Volume27
Issue number2
DOIs
Publication statusPublished - 1 Apr 2006
Externally publishedYes

Keywords

  • Dispersion
  • Droplet
  • Evaporation
  • Karman
  • Unsteady
  • Vortex street

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