Turbulent flow in a ribbed channel analysed by the proper orhtogonal decomposition

Lei Wang, Mirko Salewski, Bengt Sundén

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

Particle image velocimetry (PIV) measurements and proper orthogonal decomposition (POD) are used to explore the turbulent structures in a ribbed channel. In this study, only one channel wall is equipped with square ribs which are oriented transversely to the main stream direction. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. The results include mean streamlines, Reynolds shear stresses, two-point correlation coefficients, POD eigenvalues and eigenfunctions. By means of the POD analysis, the underlying flow features are identified, which are the strong upward ejections from the leading edge of the rib. Essentially, these motions give rise to the sharp peaks in the fluctuating turbulent kinetic energy and make great contributions to the Reynolds shear stress.
Original languageEnglish
Title of host publication[Host publication title missing]
EditorsJ. S. Szmyd, J Spalek, T.A. Kowalewski
PublisherAHG University of Science and Technology Press
PagesTUR-1
ISBN (Print)978-83-7464-235-4
Publication statusPublished - 2009
EventExHFT-7 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics - Krakow, Poland
Duration: 2009 Jun 282009 Jul 3

Conference

ConferenceExHFT-7 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics
Country/TerritoryPoland
CityKrakow
Period2009/06/282009/07/03

Subject classification (UKÄ)

  • Energy Engineering

Keywords

  • Particle image velocimetry
  • proper orthogonal decomposition

Fingerprint

Dive into the research topics of 'Turbulent flow in a ribbed channel analysed by the proper orhtogonal decomposition'. Together they form a unique fingerprint.

Cite this