Study On The Surface Of The Moon Lunar Sheath Under Complex Topography

The first lunar revor of China “Jade Rabbit” breaks down after landing on the moon. Experts consider that lunar dust maybe the main reson. Electrostatic transport is a main mechanisms of lunar dust transport, so in the process of dust suspension mechanism, to study the moon’s surface electrostatic field is a round on the link. The "Chang e one" and other satellite data show that the surface of the lunar terrain is complex. In the sunlight, easy to form the local boundary between light and shade area under the features. At the same time, the "Data Explorer" shows the potential of the border region was significantly lower than that of light lighting. So the surface of the moon on the sheath under complex landform of suspended dust is very important.In this paper, a general numerical simulation program based on Immersed Finite Element Particle in Cell(IFE-PIC). And he numerical simulation experiments of two kinds of terrain conditions are carried out. The main research content of this paper is as follows:A general purpose numerical simulation program is established based on the IFE-PIC finite element method. the particle and interface of the collision and charge accumulation algorithm, particle emission algorithm are improved. Through the perfection of these algorithms, the numerical simulation program can undertake different physiognomy environment numerical simulation experiment.The numerical simulation results and the observed data are compared with the theoretical solution of a single sheath, the results of numerical simulation, and the results of the observation data. The correctness of the numerical simulation results is verified.The simulation experiment of the two kinds of landform conditions is carried out. There are two kinds of geomorphic conditions: one is square landscape, a circular features. In this study, the change of the structure of the sheath between light and shade area is studied, and the physical mechanism of this change is analyzed. Under the stable electric field, the law of plasma motion is studied, and the physical cause of the plasma distribution is analyzed. By comparing the simulation results of circular and square landforms, the influence of different landforms on the sheath structure is analyzed.