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Horizontal Large Eddy Simulation of Stratified Mixing in a Lock-Exchange System

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Abstract

This paper presents analytical and numerical results for two new anisotropic modifications of the Rational and Clark-α LES models. The main difference from their standard form is that in this study horizontal (as opposed to isotropic) spatial filtering is used, which is appropriate for turbulent mixing in stratified flows. We present several mathematical results regarding the horizontal Rational and Clark-α LES models. We also present numerical experiments that support the analytical developments and show that both horizontal LES models perform better than their standard, isotropic counterparts in approximating mixing in a 3D lock-exchange problem at Reynolds number Re=10,000.

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Authors and Affiliations

  1. Dipartimento di Matematica Applicata “U. Dini”, Università di Pisa, Via F. Buonarroti 1/c, 56127, Pisa, Italy

    Luigi C. Berselli

  2. Argonne National Laboratory, Argonne, IL, USA

    Paul F. Fischer

  3. Department of Mathematics, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA

    Traian Iliescu

  4. RSMAS/MPO, University of Miami, Miami, FL, USA

    Tamay M. Özgökmen

Authors
  1. Luigi C. Berselli
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  2. Paul F. Fischer
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  4. Tamay M. Özgökmen
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Correspondence to Luigi C. Berselli.

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Berselli, L.C., Fischer, P.F., Iliescu, T. et al. Horizontal Large Eddy Simulation of Stratified Mixing in a Lock-Exchange System. J Sci Comput 49, 3–20 (2011). https://doi.org/10.1007/s10915-011-9464-8

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