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- W30389458 abstract "Non-linear flat dynamo models are presented using the 2D timestepping code introduced by Elstner et al. (1990). Three effects of feedback of the magnetic field on the inducing motions are considered: α-quenching, »turbulent buoyancy«, and accretion flow. Density is assumed to be the only stratified quantity in the turbulence field. As input parameters we fix the (normalized) rms velocity as well as the (normalized) correlation length of the turbulence. Parameters associated with the definitions of the eddy diffusivity, η T , and the equipartition field, B eq , remain as free and unknown quantities of order unity. In particular, the dimensionless c η in the defining relation η T = c η u'l corr (u' the rms velocity, l corr the correlation length) governs the dynamo regime which for small c η operates far in the non-linearity" @default.
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- W30389458 date "1993-03-01" @default.
- W30389458 modified "2023-09-26" @default.
- W30389458 title "Dynamo-driven accretion in galaxies" @default.
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