Estimation of turbulent dissipation rate using 2D data in channel flows

Dinesh Bhatia, Callum Atkinson, Vassili Kitsios, Nicolas Mazellier, Julio Soria

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

1 Citation (Scopus)

Abstract

The dissipation rate of turbulent kinetic energy is a key parameter in the analysis of turbulent flows and its accurate determination in experiments is of paramount importance to turbulence research. In order to calculate turbulence dissipation rate, values of all the components of fluctuating velocity gradient tensor are required. Experimental methods, in particular 2D planar Particle Image Velocimetry (PIV), cannot measure velocity components in all three spatial dimensions, hence dissipation cannot be calculated completely from the data provided by such methods. This paper uses data from a Direct Numerical Simulation (DNS) to compare the true turbulent dissipation in a channel flow with its estimates calculated from various models available in literature. These models are shown to fail near the wall, where a substantial fraction of the turbulent kinetic energy is dissipated, significantly limiting estimates of total turbulent dissipation in the flow. This study aims to develop an improved model to estimate turbulent dissipation rate where information limited velocity field information is available especially in the near wall region.

Original languageEnglish
Title of host publicationProceedings of the 3nd World Congress on Mechanical, Chemical, and Material Engineering, MCM 2017
PublisherAvestia Publishing
Number of pages8
ISBN (Print)9781927877326
DOIs
Publication statusPublished - 2017
EventWorld Congress on Mechanical, Chemical, and Material Engineering 2017 - Rome, Italy
Duration: 8 Jun 201710 Jun 2017
Conference number: 3rd

Conference

ConferenceWorld Congress on Mechanical, Chemical, and Material Engineering 2017
Abbreviated titleMCM 2017
CountryItaly
CityRome
Period8/06/1710/06/17

Keywords

  • Dissipation estimation models
  • Experiments
  • PIV
  • Turbulent dissipation rate

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