منابع مشابه
Solar Small-scale Magnetoconvection
Magnetoconvection simulations on mesogranule and granule scales near the solar surface are used to study the effect of convective motions on magnetic fields: the sweeping of magnetic flux into downflow lanes, the twisting of magnetic field lines, and the emergence and disappearance of magnetic flux tubes. Fromweak seed fields, convective motions produce highly intermittent magnetic fields in th...
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Simulations of nonlinear, anelastic convection in the presence of magnetic fields have revealed a complex array of dynamic phenomena, including several kinds of nonlinear oscillations (Lantz & Sudan 1993). In an attempt to identify the physical mechanism responsible for these oscillations, a simple model is proposed in which the full magnetoanelastic equations are replaced by equations for the ...
متن کاملAnisotropic turbulence in rotating magnetoconvection
Numerical simulations of the 3D MHD-equations that describe rotating magnetoconvection in a Cartesian box have been performed using the code NIRVANA. The characteristics of large-scale quantities like the turbulence intensity and the turbulent heat flux that are caused by the average action of the small-scale fluctuations are computed directly from the fluctuating primitive variables. and the e...
متن کاملRotating Magnetoconvection with Magnetostrophic Balance
The linear theory for the onset of convection in a rotating layer with an imposed vertical magnetic field is studied for large Taylor (Ta) and Chandrasekhar (Q) numbers. The velocity and magnetic field perturbations are in magnetostrophic balance. For small values of σ = ν/κ and ζ = η/κ, where ν, κ and η are the kinematic viscosity, and thermal and ohmic diffusivities, three oscillatory modes a...
متن کاملNonlinear cascades in two-dimensional turbulent magnetoconvection.
The dynamics of spectral transport in two-dimensional turbulent convection of electrically conducting fluids is studied by means of direct numerical simulations in the frame of the magnetohydrodynamic Boussinesq approximation. The system performs quasioscillations between two different regimes of small-scale turbulence: one dominated by nonlinear magnetohydrodynamic interactions; the other gove...
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ژورنال
عنوان ژورنال: Physics Letters A
سال: 2008
ISSN: 0375-9601
DOI: 10.1016/j.physleta.2008.10.074