107 citations · 262 across the 7 of their papers we have counts for
7 papers
Universal behaviour of -viscosity in black hole accretion discs
Marek A. Abramowicz, Axel Brandenburg, Jiří Horák +4
The Shakura-Sunyaev -viscosity coefficient, defined as the ratio of total stress to total pressure, , began to play an important role in the development of accr…
Yoshizawa's cross-helicity effect and its quenching
A. Brandenburg, K. -H. Rädler
A central quantity in mean-field magnetohydrodynamics is the mean electromotive force EMF, which in general depends on the mean magnetic field. It may however have a part independe…
Modeling spatio-temporal nonlocality in mean-field dynamos
M. Rheinhardt, A. Brandenburg
When scale separation in space and time is poor, the alpha effect and turbulent diffusivity have to be replaced by integral kernels. Earlier work in computing these kernels using t…
Mean-field transport in stratified and/or rotating turbulence
A. Brandenburg, K. -H. Rädler, K. Kemel
We investigate the mean electromotive force in the kinematic framework, that is, ignoring the back-reaction of the magnetic field on the fluid velocity, under the assumption of axi…
Test-field method for mean-field coefficients with MHD background
M. Rheinhardt, A. Brandenburg
Aims: The test-field method for computing turbulent transport coefficients from simulations of hydromagnetic flows is extended to the regime with a magnetohydrodynamic (MHD) backgr…
Mean electromotive force proportional to mean flow in mhd turbulence
K. -H. Rädler, A. Brandenburg
In mean-field magnetohydrodynamics the mean electromotive force due to velocity and magnetic field fluctuations plays a crucial role. In general it consists of two parts, one indep…