Influence of Centrifugal Buoyancy in Thermal Convection within a Rotating Spherical Shell

The dynamo action, which is of importance in the study geomagnetism mechanism, considered to be caused by convection structure formed inside a rotating spherical shell. This elongated rotation axis generated action both heat and on fluid In this study, we analyzed thermal such shell attempted understand phenomenon convective structure. It known that each value Prandtl number, Ekman number Rayleigh their balance are important for generation We fixed these three parameters effect centrifugal buoyancy as Froude additionally. To investigate how effects affect structure, carried out three-dimensional numerical simulations linear stability analyses. particular, focused transition from axisymmetric flow non-axisymmetric having wavenumbers toroidal direction investigated growth rate phase velocity disturbance. was found tends maintained increases.