Influence of Magnetic Diffusion on Short-Wavelength Magnetic Buoyancy Instabilityetc15 Tracking Number 344 Presentation: Session: Instability and Transition 4 Room: Room A Session start: 13:30 Wed 26 Aug 2015 Marek Grądzki mgradzki@igf.edu.pl Affifliation: Institute of Geophysics, Polish Academy of Sciences Krzysztof Mizerski kamiz@igf.edu.pl Affifliation: Institute of Geophysics, Polish Academy of Sciences Topics: - Instability and transition Abstract: Magnetic buoyancy instability (MBI) is believed to plays an important role in the evolution of magnetic fields in astrophysical objects. In the Sun large-scale toroidal magnetic field is probably generated in the tachocline – a thin region of strong radial shear, between radiative and convective zones. Observations indicate that this field rises the surface and create active regions. MBI is a probable mechanism for this phenomenon. Magnetic and thermal diffusivity are parameters of solar plasma which could be important for dynamics of MBI. Here we consider preliminary case which include only magnetic dissipation. The singular perturbation methods are used to find difference with case without any dissipation. |