基于粒子网格模拟的涡旋电磁波与等离子体的联合建模方法

Co-modeling Method of Vortex Electromagnetic Wave and Plasma Based on Particle-in-cell

摘要:

针对高超声速目标的涡旋电磁波探测需求,提出了一种基于粒子网格模拟方法的涡旋电磁波与等离子体的联合建模方法。利用总场/散射场技术实现任意模态涡旋电磁波的激励,采用粒子网格模拟方法进行等离子体的物理特性建模,结合时域间断伽辽金方法建立高效电磁求解器,完成了涡旋电磁波与等离子体的联合动态建模。三维等离子体与涡旋电磁波相互作用仿真实例验证了所提建模方法的高计算精度和强稳定性。该方法为揭示等离子体对涡旋电磁波目标探测的影响规律提了供技术支撑。

Abstract:

Aiming at the vortex electromagnetic wave detection requirements for hypersonic targets, a co-modeling method of vortex electromagnetic wave and plasma based on particle-in-cell (PIC) was proposed. The total field/scatter field technology was used for exciting arbitrarily mode vortex electromagnetic waves, the PIC was used for modeling the physical characteristics of plasma. Combined with the discontinuous Galerkin time domain (DGTD), the efficient electromagnetic solver was established to achieve the dynamic co modeling of vortex electromagnetic wave and plasma. Several 3D plasma-vortex electromagnetic wave interaction simulation examples are given to demonstrate high calculation accuracy and strong stability of the proposed modeling method. This method provides technical support for revealing the influence law of plasma on the targets detection of vortex electromagnetic wave.