Proper Orthogonal Decomposition of the flow in a T-junction

E. Merzari, W. D. Pointer, Paul Fischer

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

Abstract

An LES simulation of the turbulent mixing in a T-junction has been carried out with the spectral element code NEK5000. Numerical results have been compared with an available experiment. A large database of snapshots has then been collected and Proper Orthogonal Decomposition (POD), a powerful statistical tool, has been used to identify the most energetic modes of turbulence. Since POD was also performed on the experiment PIV data, a further means of verification and validation was available for the present case. The structure of the numerical POD modes offers additional insight into the physics of turbulence in T-junctions. The present work also presents a more general opportunity to make advection-diffusion computations with CFD codes less expensive when buoyancy effects are not present. One could in fact solve the Navier-Stokes equations to obtain the principal modes of turbulence and then use those modes to solve the advection-diffusion equation for the temperature or a general passive scalar on considerably longer time frames.

Original languageEnglish (US)
Title of host publicationInternational Congress on Advances in Nuclear Power Plants 2010, ICAPP 2010
Pages1714-1721
Number of pages8
Volume3
StatePublished - 2010
Externally publishedYes
EventInternational Congress on Advances in Nuclear Power Plants 2010, ICAPP 2010 - San Diego, CA, United States
Duration: Jun 13 2010Jun 17 2010

Other

OtherInternational Congress on Advances in Nuclear Power Plants 2010, ICAPP 2010
CountryUnited States
CitySan Diego, CA
Period6/13/106/17/10

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

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