Accession Number : AD1043425


Title :   Time-Domain Full-Wave Modeling of Nonlinear Air Breakdown in High-Power Microwave Devices and Systems


Descriptive Note : Technical Report,31 Aug 2016,31 Aug 2017


Corporate Author : University of Illinois Center for Computational Electromagnetics Urbana United States


Personal Author(s) : Yan,Su ; Jin,Jian-Ming


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1043425.pdf


Report Date : 30 Sep 2017


Pagination or Media Count : 42


Abstract : This final report describes the effort to develop a discontinuous Galerkin time-domain (DGTD) method in the simulation of high-power microwave air breakdown phenomena, which are modeled by a coupled electromagnetic--plasma system. In the coupled system, the electromagnetic fields are governed by Maxwells equations and the plasma is modeled by the five moment fluid equations (Eulers equations). The non-Maxwellian electron energy distribution function (EEDF) is used to calculate electron transport coefficients and describe the non-equilibrium collision reactions between electrons and neutral air particles. The coupled Maxwell--Euler equations are solved by the DGTD method with high-order spatial and temporal discretizations, which are able to provide a sufficient resolution for the physical quantities in both space and time. Several numerical examples are presented to investigate the physical process and demonstrate the capability of the numerical method.


Descriptors :   time domain , finite element analysis , GALERKIN METHOD , electromagnetic fields , Maxwells equations , euler equations , HIGH POWER MICROWAVE


Subject Categories : Radiofrequency Wave Propagation
      Numerical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE