Modeling of air breakdown by single-mode and multi-mode lasers

Andrea Alberti, Alessandro Munafò, Carlos A Pantano-Rubino, Jonathan Freund, Marco Panesi

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

Abstract

We present a physics-based non-equilibrium plasma model for Laser Induced Breakdown (LIB). Here, we consider the influence of mode-beating pulse on the plasma generation. The system of chemically reactive Navier-Stokes equations describes the hydrodynamics and non-equilibrium effects are accounted for by means of a two-temperature model for heavy-particles and free-electrons. The non-equilibrium radiation model is based on a kinetic approach for the photons (radiative transfer equation formulation). Inverse Bremsstrahlung, multiphoton ionization, chemical kinetics and shock wave dynamics are taken into account. Simulations were conducted in quiescent ambient air at atmospheric pressure. The computed absorbed energy is in good agreement with the experiments for both the single-mode and multi-mode laser operating configuration; the kernel formation and dynamics depends on the mode-beating pulse shape, as observed experimentally. The kernel structure for the multi-mode configuration appears periodic, with the distance between the scattered spots being a function of the modulating frequency.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
DOIs
StatePublished - Jan 1 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum, 2019
CountryUnited States
CitySan Diego
Period1/7/191/11/19

Fingerprint

Laser modes
Air
Plasmas
Radiative transfer
Reaction kinetics
Shock waves
Navier Stokes equations
Atmospheric pressure
Ionization
Photons
Hydrodynamics
Physics
Radiation
Kinetics
Electrons
Lasers
Experiments
Temperature

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Alberti, A., Munafò, A., Pantano-Rubino, C. A., Freund, J., & Panesi, M. (2019). Modeling of air breakdown by single-mode and multi-mode lasers. In AIAA Scitech 2019 Forum (AIAA Scitech 2019 Forum). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2019-1250

Modeling of air breakdown by single-mode and multi-mode lasers. / Alberti, Andrea; Munafò, Alessandro; Pantano-Rubino, Carlos A; Freund, Jonathan; Panesi, Marco.

AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics Inc, AIAA, 2019. (AIAA Scitech 2019 Forum).

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

Alberti, A, Munafò, A, Pantano-Rubino, CA, Freund, J & Panesi, M 2019, Modeling of air breakdown by single-mode and multi-mode lasers. in AIAA Scitech 2019 Forum. AIAA Scitech 2019 Forum, American Institute of Aeronautics and Astronautics Inc, AIAA, AIAA Scitech Forum, 2019, San Diego, United States, 1/7/19. https://doi.org/10.2514/6.2019-1250
Alberti A, Munafò A, Pantano-Rubino CA, Freund J, Panesi M. Modeling of air breakdown by single-mode and multi-mode lasers. In AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics Inc, AIAA. 2019. (AIAA Scitech 2019 Forum). https://doi.org/10.2514/6.2019-1250
Alberti, Andrea ; Munafò, Alessandro ; Pantano-Rubino, Carlos A ; Freund, Jonathan ; Panesi, Marco. / Modeling of air breakdown by single-mode and multi-mode lasers. AIAA Scitech 2019 Forum. American Institute of Aeronautics and Astronautics Inc, AIAA, 2019. (AIAA Scitech 2019 Forum).
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