Delayed-VLES model for the simulation of turbulent flows

Yang Zhang, Junqiang Bai, Chen Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Speziale's VLES is one of the hybrid RANS/LES methods according to previous researches. VLES method used a unified modelled stress equation that was adjusted by resolution control function. Due to the nature of compromising grid space information, VLES can conveniently lead to a modelled stress dissipation beneath the boundary layer by computing from coarse grid to fine grid. The present study proposes a delayed-VLES (DVLES) method which can improve the modelled stress dissipation phenomenon. The advantage of the DVLES is that the RANS simulation can be preserved in nearwall region by using a damping function. This new methodology is assembled with Menter's SST model. Applications are conducted for the turbulent flat plate and turbulent flow past a NACA0021 airfoil at 60° incidence. The corresponding results are compared with VLES and URANS. It is demonstrated that the DVLES is favorably robust with the grid refinement.

Original languageEnglish
Title of host publicationParallel Computational Fluid Dynamics - 25th International Conference, ParCFD 2013, Revised Selected Papers
PublisherSpringer Verlag
Pages344-353
Number of pages10
ISBN (Print)9783642539619
DOIs
StatePublished - 2014
Event26th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013 - Changsha, China
Duration: 20 May 201324 May 2013

Publication series

NameCommunications in Computer and Information Science
Volume405
ISSN (Print)1865-0929

Conference

Conference26th International Conference on Parallel Computational Fluid Dynamics, ParCFD 2013
Country/TerritoryChina
CityChangsha
Period20/05/1324/05/13

Keywords

  • Hybrid RANS/LES
  • RANS
  • Turbulent flows simulation
  • VLES

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