492 citations
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- Instituto de Astrofísica de CanariasES144 papers
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9 papers · 1 filter
Local models of stellar convection: Reynolds stresses and turbulent heat transport
P. J. Käpylä, M. J. Korpi, I. Tuominen
We study stellar convection using a local three-dimensional MHD model, with which we investigate the influence of rotation and large-scale magnetic fields on the turbulent momentum…
Numerical simulation of the three-dimensional structure and dynamics of the non-magnetic solar chromosphere
Sven Wedemeyer, Bernd Freytag, Matthias Steffen +2
Three-dimensional numerical simulations with CO5BOLD, a new radiation hydrodynamics code, result in a dynamic, thermally bifurcated model of the non-magnetic chromosphere of the qu…
Simulations of nonhelical hydromagnetic turbulence
Nils Erland L. Haugen, Axel Brandenburg, Wolfgang Dobler
Nonhelical hydromagnetic forced turbulence is investigated using large scale simulations on up to 256 processors and meshpoints. The magnetic Prandtl number is varied betw…
Outflows from dynamo-active protostellar accretion discs
Brigitta von Rekowski, Axel Brandenburg, Wolfgang Dobler +1
An axisymmetric model of a cool, dynamo-active accretion disc is applied to protostellar discs. Thermally and magnetically driven outflows develop that are not collimated within 0.…
High resolution simulations of nonhelical MHD turbulence
Nils Erland L. Haugen, Axel Brandenburg, Wolfgang Dobler
According to the kinematic theory of nonhelical dynamo action the magnetic energy spectrum increases with wavenumber and peaks at the resistive cutoff wavenumber. It has previously…
Non-Fickian diffusion and tau approximation from numerical turbulence
Axel Brandenburg, Petri Käpylä, Amjed Mohammed
Evidence for non-Fickian diffusion of a passive scalar is presented using direct simulations of homogeneous isotropic turbulence. The results compare favorably with an explicitly t…