DNS of turbulent flow in an elliptical duct

Nikolay Nikitin, Alexander Yakhot

Research output: Contribution to conferencePaperpeer-review


Direct numerical simulation (DNS) of fully-developed turbulent flow in elliptical ducts is performed. The mean cross-stream secondary flows exhibited by two counter-rotating vortices which are symmetrical about the major ellipse's axis. The mean flow characteristics and turbulence statistics have been obtained. The variation of the statistical quantities such as the Reynolds stresses and turbulence intensities along the minor axis of the elliptical cross-section were found to be similar to plane channel data. The turbulent statistics along the major axis was found to be inhibited by the secondary flow transferring high-momentum fluid from the duct's center towards the wall. The instantaneous velocity fields in the near-wall region revealed structures similar to the "streaks" except in the vicinity of the major axis endpoints where significant reduction of the turbulent activity due to the wall transverse curvature effect was found.

Original languageEnglish
Number of pages6
StatePublished - 1 Dec 2005
Event4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States
Duration: 27 Jun 200529 Jun 2005


Conference4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
Country/TerritoryUnited States
CityWilliamsburg, VA

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes


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