Investigation of the geomagnetic reversal through the multi-layer and multi-component-abundance model and improved RHPIC-LBM code on the supercomputer platform

In this work, the improved relativistic hybrid particle-in-cell & lattice Boltzmann method (RHPIC-LBM2), by adding multi-layer and the multi-component-abundance (M-CAI, Fe, Ni, electrons) module, is developed and applied to investigate the geomagnetic reversal on the supercomputer platform. Firstly, the explicit expression of the M-CAI terms under fully coupled hydro-dynamic-kinetic continuous scales was deduced by considering the turbulence-resistance-induced self-generated organization and the turbulence-viscosity-induced self-feeding-sustaining with dynamo mean field theory. Then, the input module was improved, and a new M-CAI module with the original RHPIC-LBM model algorithm code was added. Finally, the improved turbulence Debye-shielding model, which provides a way to describe the macro-dynamic averaging effect (2,200 kilometers) from numerous micro-kinematic (Debye length scale) evolutions, was used to explore the 2,200-kilometer-thick charged flow, current density, and magnetic field under fully coupled scale. The main findings of the present study are as follows: 1) the combined effect of buoyancy force (generated by mantle convection in the direction of the celestial axis; the convection from the heat of the inner core, outer core, and mantle), the centrifugal force-I (generated by the Earth rotates in the direction outward away from the celestial axis), the centrifugal force-II (generated by the earth revolution around the sun in the direction of Earth's axis of revolution, perpendicular to the ecliptic plane), the friction force-I (generated by the different velocity between the outer core and inner core in the tangential direction at the equatorial plane), the friction force-II(generated by the spin of the outer core and the mantel), the tidal force (generated by the gravitational attraction between the Earth and the moon); 2) the magnetic field will flap in 150~170 million years with 2~4 thousand years. These results may be a key point and give new insights for the investigation of the Earth-Moon space environment, which serves for the planetary environment research in 'National Mid- and Long-term Plan for Space Science in China (2024-2050) through the observational Earth magnetic model (Macao Science 1. WM³ real-time observational data).

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