<abstract xmlns="http://www.w3.org/1999/xhtml"><p> This work deals with Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) of a turbulent gravity current in a gas, performed by means of a Discontinuous Galerkin (DG) Finite Elements method employing, in the LES case, LES-DG turbulence models previously introduced by the authors. Numerical simulations of non-Boussinesq lock-exchange benchmark problems show that, in the DNS case, the proposed method allows to correctly reproduce relevant features of variable density gas ows with gravity. Moreover, the LES results highlight, also in this context, the excessively high dissipation of the Smagorinsky model with respect to the Germano dynamic procedure.</p></abstract>

This work deals with Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) of a turbulent gravity current in a gas, performed by means of a Discontinuous Galerkin (DG) Finite Elements method employing, in the LES case, LES-DG turbulence models previously introduced by the authors. Numerical simulations of non-Boussinesq lock-exchange benchmark problems show that, in the DNS case, the proposed method allows to correctly reproduce relevant features of variable density gas ows with gravity. Moreover, the LES results highlight, also in this context, the excessively high dissipation of the Smagorinsky model with respect to the Germano dynamic procedure.

Large Eddy Simulation of gravity currents with a high order DG method

Communications in Applied and Industrial Mathematics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Large Eddy Simulation of gravity currents with a high order DG method"}

This work deals with Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) of a turbulent gravity current in a gas, performed by means of a...

Large Eddy Simulation of gravity currents with a high order DG method

Publié en ligne: 20 juil. 2017

Pages: 128 - 148

Reçu: 20 déc. 2016

Accepté: 29 mai 2017

DOI: https://doi.org/10.1515/caim-2017-0007

Mots clés
Large Eddy Simulation, dynamical models, density currents, low Mach number flows, Discontinuous Galerkin method

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Large Eddy Simulation of gravity currents with a high order DG method

Publié en ligne: 20 juil. 2017

Pages: 128 - 148

Reçu: 20 déc. 2016

Accepté: 29 mai 2017

DOI: https://doi.org/10.1515/caim-2017-0007

Mots clésLarge Eddy Simulation, dynamical models, density currents, low Mach number flows, Discontinuous Galerkin method

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
Large Eddy Simulation, dynamical models, density currents, low Mach number flows, Discontinuous Galerkin method