177 citations · 2.4k across the 68 of their papers we have counts for
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Open and closed boundaries in large-scale convective dynamos
P. J. Käpylä, M. J. Korpi, A. Brandenburg
Context. Earlier work has suggested that large-scale dynamos can reach and maintain equipartition field strengths on a dynamical time scale only if magnetic helicity of the fluctua…
Convective dynamos in spherical wedge geometry
P. J. Käpylä, M. J. Korpi, A. Brandenburg +2
Self-consistent convective dynamo simulations in wedge-shaped spherical shells are presented. Differential rotation is generated by the interaction of convection with rotation. Equ…
The alpha effect in rotating convection with sinusoidal shear
P. J. Käpylä, M. J. Korpi, A. Brandenburg
Using three-dimensional convection simulations it is shown that a sinusoidal variation of horizontal shear leads to a kinematic αeffect with a similar sinusoidal variation. The eff…
Reynolds stresses from hydrodynamic turbulence with shear and rotation
J. E. Snellman, P. J. Käpylä, M. J. Korpi +1
To study the Reynolds stresses which describe turbulent momentum transport from turbulence affected by large-scale shear and rotation. Three-dimensional numerical simulations are u…
Oscillatory migrating magnetic fields in helical turbulence in spherical domains
Dhrubaditya Mitra, Reza Tavakol, Petri J. Käpylä +1
We present direct numerical simulations of the equations of compressible magnetohydrodynamics in a wedge-shaped spherical shell, without shear, but with random helical forcing whic…