Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session D38: Large Eddy Simulations
2:30 PM–4:40 PM,
Sunday, November 18, 2018
Georgia World Congress Center Room: Ballroom 1/2
Chair: Steven Miller, University of Florida
Abstract ID: BAPS.2018.DFD.D38.3
Abstract: D38.00003 : Some properties of a class of large eddy simulation turbulence models for incompressible magnetohydrodynamics
2:56 PM–3:09 PM
(Sandia National Laboratories)
(University of Southern California)
A new class of large eddy simulation turbulence models for incompressible magnetohydroynamics was developed in . The new models were based upon the residual-based variational multiscale formulation. Tests on the decaying Taylor-Green vortex flow at various Reynolds numbers showed good results when compared to direct numerical simulations. The residual-based character of the models allows them to adapt to the flow physics. Moreover, the models are insensitive to model parameters. This property is demonstrated on three TG vortex flows each exhibiting a different energy spectrum. The new models, without any parameter tuning, are able to capture the correct inertial range behavior of each flow. Such adaptivity may be beneficial given the non-universality of MHD turbulence. Finally, under certain flow conditions, the models are able to capture a subgrid dynamo phenomenon in which an inverse energy cascade from unresolved velocity scales transfers energy to the resolved magnetic field.
 Sondak, D., Shadid, J.N., Oberai, A., Pawlowski, P., Cyr, E.C., Smith, T.M., A new class of finite element variational multiscale turbulence models for incompressible magnetohydrodynamics, Journal of Computational Physics 295, 596-616, 2015.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.D38.3
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