Proper Orthogonal Decomposition of the flow in a T-junction

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

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

4 Scopus citations

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
StatePublished - 2010
EventInternational Congress on Advances in Nuclear Power Plants 2010, ICAPP 2010 - San Diego, CA, United States
Duration: Jun 13 2010Jun 17 2010

Publication series

NameInternational Congress on Advances in Nuclear Power Plants 2010, ICAPP 2010
Volume3

Other

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

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

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