Exploration of Lunar magnetic fields with dynamo thermally and tidal heating-driven rheology model

The planetary magnetic field, caused by convective currents in the cores and linking thermal and interior, is a fundamental way to determine the angular momentum exchange and secular variation in the core motions & core-mantle coupling system. But understanding the high temperature-pressure (e.g., ~5000 °C, 135~330 Gigapascals) rheology fluid flows in planetary cores is a tremendous interdisciplinary challenge. The fine-structure investigation requires understanding the fundamental rheology fluid dynamic involving turbulence and rotation from continuing hydro-dynamo-kinetic coupling scales well beyond the present traditional partial differential equation virtual test.

The lunar magnetic field is believed not currently to possess a feeble global magnetic field and can be ignored when exploring the solar-flare CME-induced solar storm transplant on the lunar surface. The hypothesis holds that the crustal magnetizations were acquired early in lunar history when dynamics were still operating. At that time, the dynamo magnetic fields were generated by the thermochemical convection of electrically conductive alloy metal liquid within lunar cores and reduced with the convection cooling process. The turbulence mechanical stirring of lunar core rheology fluids and perturbations by the tidal effect and orbital precession can contribute to sustaining dynamo fields.

With the supporting observations of China’s lunar and deep space exploration in recent years, it has become possible to re-estimates the past magnetic field by considering combining the tidal heating induced dissipation from viscous friction associated with the differential procession at a different angle and dynamo action (the non-ideal plasma; inner core-outer core-mantle; warm dense matter; liquid iron alloy; chemical-geological properties; density-temperature-pressure) together again.

In this work, based on the newly developed optimization methodology and numerical algorithm of relativistic hybrid particle-in-cell and lattice Boltzmann (RHPIC-LBM version 1.1.2), we establish the 3D lunular magnetic field modeling with combined rheology dynamo thermally and tidal-heating of its lunar cores and investigate the history of magnetic field evolution; And figure out the effect of tidal heating in the deepest lunar mantle,  and offer a possible unprecedented window on this intermediate state of rheology matter and providing a new virtual testing ground for dense rheology plasma theories.