Turbulent flow around a wall-mounted cube: A direct numerical simulation

Alexander Yakhot, Heping Liu, Nikolay Nikitin

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

Abstract

An immersed-boundary method was employed to perform a direct numerical simulation (DNS) of flow around a wall-mounted cube in a fully developed turbulent channel for a Reynolds number Re = 5610, based on the bulk velocity and the channel height. Instantaneous results of the DNS of a plain channel flow were used as a fully developed inflow condition for the main channel. The results confirm the unsteadiness of the considered flow caused by the unstable interaction of a horseshoe vortex formed in front of the cube and on both its sides with an arch-type vortex behind the cube. The time-averaged data of the turbulence mean-square intensities, Reynolds shear stresses, kinetic energy and dissipation rate are presented. The negative turbulence production is predicted in the region in front of the cube where the main horseshoe vortex originates.

Original languageEnglish
Pages (from-to)994-1009
Number of pages16
JournalInternational Journal of Heat and Fluid Flow
Volume27
Issue number6
DOIs
StatePublished - 1 Dec 2006

Keywords

  • Direct numerical simulation
  • Immersed-boundary method
  • Negative turbulence production
  • Turbulence

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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