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

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2017
Accession Number
AD1043425

Entities

People

  • Jian-ming Jin
  • Su Yan

Organizations

  • University of Illinois Urbana–Champaign

Tags

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Boltzmann Equation
  • Coefficients
  • Collisions
  • Computational Fluid Dynamics
  • Distribution Functions
  • Electromagnetic Fields
  • Electromagnetic Shielding
  • Electron Density
  • Electron Energy
  • Electrons
  • Energy
  • Equations
  • Euler Equations
  • High Power Microwaves
  • Simulations
  • Time Domain

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Microelectronics
  • Space
  • Space - Hall-Effect Thruster