TY - GEN
T1 - Modeling of laser-induced breakdown phenomena in non-equilibrium plasmas
AU - Munafò, Alessandro
AU - Alberti, Andrea
AU - Pantano-Rubino, Carlos A
AU - Freund, Jonathan
AU - Panesi, Marco
N1 - Funding Information:
This material is based in part upon work supported by the Department of Energy, National Nuclear Security Administration, under Award Number DE-NA0002374. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the Department of Energy.
Publisher Copyright:
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
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U2 - 10.2514/6.2018-0171
DO - 10.2514/6.2018-0171
M3 - Conference contribution
AN - SCOPUS:85141637017
SN - 9781624105241
T3 - AIAA Aerospace Sciences Meeting, 2018
BT - AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Aerospace Sciences Meeting, 2018
Y2 - 8 January 2018 through 12 January 2018
ER -