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Unified RANS-LES Simulations of Turbulent Swirling Jets and Channel Flows

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Progress in Hybrid RANS-LES Modelling

Part of the book series: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ((NNFM,volume 130))

Abstract

The accurate and efficient simulation of both attached and separated flows represents a huge challenge. RANS methods suffer from the lack of ability to simulate instantaneous turbulence structures, and LES methods are computationally very expensive regarding the simulation of wall-bounded flows, which have to be considered very often. A promising alternative is the use of hybrid RANS-LES methods, but existing hybrid methods like DES face many questions. The paper focuses on the use of unified RANS-LES methods implied by stochastic analysis as an alternative to using existing hybrid RANS-LES methods. The theoretical basis of the approach applied and applications to turbulent channel flows and turbulent swirling jet flows will be presented. The accuracy and cost features of the unified RANS-LES model will be discussed in comparison with other (in particular DES) hybrid methods.

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Acknowledgments

This work was partially sponsored by the Air Force Office of Scientific Research, USAF, under grant number FA9550-05-1-0485 monitored by Dr. John Schmisseur. We would also like to acknowledge support through NASA’s NRA research opportunities in aeronautics program (Grant No. NNX12AJ71A) with Dr. P. Balakumar as the technical officer. The computational resources have been provided by the UW Institute for Scientific Computation.

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Authors and Affiliations

  1. Department of Mathematics, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA

    Stefan Heinz

  2. Mechanical Engineering Department, University of Wyoming, 1000 E. University Avenue, Laramie, WY, 82071, USA

    Michael K. Stöllinger

  3. Mechanical Engineering, Union College, 218 Steinmetz Hall, 807 Union Street, Schenectady, NY, 12308, USA

    Harish Gopalan

Authors
  1. Stefan Heinz
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  2. Michael K. Stöllinger
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  3. Harish Gopalan
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Corresponding author

Correspondence to Stefan Heinz .

Editor information

Editors and Affiliations

  1. Aerospace Engineering Department, Texas A&M University, College State, Texas, USA

    Sharath Girimaji

  2. Werner Haase Aeronautics Consultants, Neubiberg, Bayern, Germany

    Werner Haase

  3. Div Information & Aeronautical Syst, Swedish Defence Research Agency FOI, Stockholm, Sweden

    Shia-Hui Peng

  4. Center of Computer Applications in Aerospace Science and Engineering, DLR, Institut für Aerodynamik und Strömungstechnik, Göttingen, Germany

    Dieter Schwamborn

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Heinz, S., Stöllinger, M.K., Gopalan, H. (2015). Unified RANS-LES Simulations of Turbulent Swirling Jets and Channel Flows. In: Girimaji, S., Haase, W., Peng, SH., Schwamborn, D. (eds) Progress in Hybrid RANS-LES Modelling. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 130. Springer, Cham. https://doi.org/10.1007/978-3-319-15141-0_21

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  • DOI: https://doi.org/10.1007/978-3-319-15141-0_21

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-15140-3

  • Online ISBN: 978-3-319-15141-0

  • eBook Packages: EngineeringEngineering (R0)

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