| The solar-terrestrial space.is the very space environment that has a very impor-tant meaning to human being, in which place many phenomena, most of them arerelated to the solar, occur are closely interrelated to us human. In these phenomena,the magnetic reconnection plays the key role.Magnetic reconnection is a regional phenomenon and, meanwhile, a very im-portant study subject in both of space plasma physics and laboratory plasma physics.When magnetic reconnection happens, the stricture of the magnetic field will bechanged with the release of the energy in it, which will be transformed to the kineticenergy and thermal energy of plasma, then ions and electrons are accelerated whichproduce the high speed flow. It’s more than fifty years since the concept of magneticreconnection was firstly introduced. During the period of the five decades, the theoryof magnetic reconnection was developed more implemented and advanced. However,we still don’t understand it well how it works due to its lack of direct observationevens and its complicated mechanism, some of which are still confusing the re-searchers. All above make it the frontier of the plasma physics among the solar phy-sicists and astrophysicists recently.In this article, the concept of the solar-terrestrial space and many phenomenarelated to magnetic reconnection will be presented first. Then the concept of mag-netic reconnection and its conceptual picture and process, including the magneticdiffusion and magnetic freezing, and some main models will be introduced. Follow-ing we will learn three simulation methods, and the details of the hybrid simulationwhich will be used in this article. Last, we will study how the resistivity-gradient af-fects the process of magnetic reconnection and phenomena of physics via2.5D hy-brid simulation, and discuss it. |
