Location of Repository

Coherent structures in marginally turbulent square duct flow

By Markus Uhlmann, Alfredo Pinelli, Atshushi Sekimoto and Genta Kawahara

Abstract

Direct numerical simulation of fully developed turbulent flow in a straight square duct was performed in order to determine the minimal requirements for self-sustaining turbulence. It was found that turbulence can be maintained for values of the bulk Reynolds number above approximately 1100, corresponding to a friction-velocity-based Reynolds number of 80. The minimum value for the streamwise period of the computational domain measures around 190 wall units, roughly independently of the Reynolds number. Furthermore, we present a characterization of the marginal state, where coherent structures are found to have significant relevance to the appearance of secondary flow of Prandtl’s second kind

Topics: Física
Publisher: Springer
Year: 2008
DOI identifier: 10.1007/978-1-4020-6472-2_21
OAI identifier: oai:www.ucm.es:22021
Provided by: EPrints Complutense
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://link.springer.com/chapt... (external link)
  • http://dx.doi.org/10.1007/978-... (external link)
  • https://eprints.ucm.es/22021/ (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.