Speaker
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Co-authors: Longhui Yuan, Philippe Marti and Jiawen Luo
Abstract: Earth’s magnetic field is believed to be generated in the metallic outer core through a process known as geodynamo. Direct numerical simulation (DNS) of geodynamo has successfully reproduced many features of the Earth’s field. Still, even the state-of-the-art simulations have a much higher viscosity than the Earth’s outer core. Taylor (1963) proposed a reduced model by neglecting inertia and viscous force. A modified model that partially re-introduces the inertia term back is termed the torsional wave (TW) dynamo model, since it admits torsional oscillations, a special type of Alfven wave.
In this study, we present progress to date in our studies of inviscid dynamo simulation.