Tetrahedral Fluid Method Applied to FDTD for Simulation of Transient Behaviors of High-Energy Collisionless Plasmas

A new method called tetrahedral fluid method is presented in this paper. It is developed based on the fluid behavior of plasmas, unlike particle-based models, such as particle in cell; this method serves the continuity of the charge regions. The modeling of a moving plasma is performed by a fluid segmentation, in which the interaction with plasma fields is treated by the finite-difference time-domain numerical technique. The development of the relation between two field and fluid lattices has been described. The important part of this relation is the determination of the common volumes in the two lattices. A comparison is made between the results obtained by this method and those using the nearest grid point method, which shows the increased accuracy and speed of the proposed technique in a sample problem.