Modeling of laser-induced breakdown phenomena in non-equilibrium plasmas

Alessandro Munafò, Andrea Alberti, Carlos Pantano, Jonathan B. Freund, Marco Panesi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work discusses the modeling of Laser Induced Breakdown (LIB) in gases. The interaction between the laser beam and the plasma is described via a fluid approach based on the Navier-Stokes equations for a gas in Non-Local Thermodynamic Equilibrium (NLTE). The radiation field is split in two components: (i) collimated and (ii) and non-collimated. To model the collimated component (i.e., the laser), a flux-tube formulation of the Radiative Transfer Equation (RTE) is developed. The non-collimated component, representing the radiation from the laser-induced plasma, is described by an optically thin loss model. The flow governing equations are discretized in space using a second-order finite volume method. The system of equations is time-integrated by a point-implicit dual-time-stepping method. Applications consider the breakdown stage and the early post-breakdown evolution in oxygen plasmas.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Edition210059
ISBN (Print)9781624105241
DOIs
StatePublished - 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Publication series

NameAIAA Aerospace Sciences Meeting, 2018
Number210059

Other

OtherAIAA Aerospace Sciences Meeting, 2018
CountryUnited States
CityKissimmee
Period1/8/181/12/18

ASJC Scopus subject areas

  • Aerospace Engineering

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