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Wall-Modeling in Complex Turbulent Flows

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Advances in Fluid-Structure Interaction

Part of the book series: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ((NNFM,volume 133))

Abstract

Resolution of wall layer turbulent structures in large eddy simulation of high Reynolds number flows of aeronautical interest requires inordinate computational resources. LES with wall models is therefore employed in engineering applications. We report on recent advances at the Center for Turbulence Research (CTR) in the development of wall boundary conditions for complex turbulent flows computed on unstructured grids. We begin by describing a novel application of wall modeled LES to a high lift airfoil system. This flow field is very complex involving boundary layers, free shear flows, separation and laminar/turbulence transition. We then describe a non-equilibrium model that requires the solution of the full 3D RANS equations in the near wall region. This model is successfully applied to a spatially evolving transitional and a high Reynolds number flat plate boundary layer. Finally we describe a new approach to LES using differential filters. An important byproduct of this approach is the derivation of slip velocity boundary conditions for wall modeled LES. This methodology is successfully applied to flow over NACA4412 airfoil at near stall conditions.

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Notes

  1. 1.

    A massively parallel unstructured finite volume LES solver for compressible flows developed at Cascade Technologies, Inc.

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Acknowledgments

Multi-element airfoil simulations have been performed under the support of NASA through the Subsonic Fixed-Wing Program (Grant NNX11AI60A) and the Boeing Company. Part of the computations have been performed on the Intrepid Blue Gene P system at Argonne National Laboratory (ALCF) through the MMTURB project. Other computations have been performed on the Vulcan IBM Blue Gene/Q system at Lawrence Livermore National Laboratory, funded by the Advanced Simulation and Computing (ASC) Program of the National Nuclear Security Administration (NNSA). Access to Vulcan clusters was provided through the Predictive Science Academic Alliance Program (PSAAP) and is greatfully acknowledged.

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Authors and Affiliations

  1. Center for Turbulence Research, Stanford University, Stanford, CA, 94305-3035, USA

    Parviz Moin, Julien Bodart & George Ilhwan Park

  2. Cascade Technologies Inc., Palo Alto, CA, 94303, USA

    Sanjeeb Bose

Authors
  1. Parviz Moin
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  2. Julien Bodart
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  3. Sanjeeb Bose
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  4. George Ilhwan Park
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Corresponding author

Correspondence to Julien Bodart .

Editor information

Editors and Affiliations

  1. Fluides de Toulouse, Institut de Mécanique des, Toulouse, France

    Marianna Braza

  2. Università di Genova, Genova, Italy

    Alessandro Bottaro

  3. Mechanical & Aerospace Engineering, Monash University, Victoria, Victoria, Australia

    Mark Thompson

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Moin, P., Bodart, J., Bose, S., Park, G.I. (2016). Wall-Modeling in Complex Turbulent Flows. In: Braza, M., Bottaro, A., Thompson, M. (eds) Advances in Fluid-Structure Interaction. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 133. Springer, Cham. https://doi.org/10.1007/978-3-319-27386-0_13

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  • DOI: https://doi.org/10.1007/978-3-319-27386-0_13

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-27384-6

  • Online ISBN: 978-3-319-27386-0

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