New large eddy simulation (LES) turbulence models for incompressiblemagnetohydrodynamics (MHD) derived from the variational multiscale (VMS)formulation for finite element simulations are introduced. The new modelsinclude the variational multiscale formulation, a residual-based eddy viscositymodel, and a mixed model that combines both of these component models. Eachmodel contains terms that are proportional to the residual of theincompressible MHD equations and is therefore numerically consistent. Moreover,each model is also dynamic, in that its effect vanishes when this residual issmall. The new models are tested on the decaying MHD Taylor Green vortex at lowand high Reynolds numbers. The evaluation of the models is based on comparisonswith available data from direct numerical simulations (DNS) of the timeevolution of energies as well as energy spectra at various discrete times. Anumerical study, on a sequence of meshes, is presented that demonstrates thatthe large eddy simulation approaches the DNS solution for these quantities withspatial mesh refinement.
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