TY - GEN
T1 - Particle image velocimetry of a nano-second laser-induced breakdown in air
AU - Koll, Matthew
AU - Freund, Jonathan B.
AU - Elliott, Gregory
N1 - Publisher Copyright:
© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Velocity field measurements of a laser-induced optical breakdown are presented in this paper. Particle image velocimetry (PIV) was performed over a wide range of probe delays, t0 = 5μs to 2000μs, in order to capture the development of the flowfield induced. The early probe delays provide information about the propagation of the shock induced by the breakdown, showing its rapid weakening as it propagates outwards, inducing velocities of 120m/s at t0 = 5μs and only 60m/s at t0 = 10μs. As the shock propagates outwards, the rarefaction wave forms, leading to the formation of two opposing jets on the top and bottom side of the plasma kernel location. As the jets develop, the ensemble averages reveal that the bottom jet is stronger in this study, eventually leading to the vortex ring ejection against the direction of the incident laser.
AB - Velocity field measurements of a laser-induced optical breakdown are presented in this paper. Particle image velocimetry (PIV) was performed over a wide range of probe delays, t0 = 5μs to 2000μs, in order to capture the development of the flowfield induced. The early probe delays provide information about the propagation of the shock induced by the breakdown, showing its rapid weakening as it propagates outwards, inducing velocities of 120m/s at t0 = 5μs and only 60m/s at t0 = 10μs. As the shock propagates outwards, the rarefaction wave forms, leading to the formation of two opposing jets on the top and bottom side of the plasma kernel location. As the jets develop, the ensemble averages reveal that the bottom jet is stronger in this study, eventually leading to the vortex ring ejection against the direction of the incident laser.
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U2 - 10.2514/6.2020-2047
DO - 10.2514/6.2020-2047
M3 - Conference contribution
AN - SCOPUS:85079240823
SN - 9781624105951
T3 - AIAA Scitech 2020 Forum
BT - AIAA Scitech 2020 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2020
Y2 - 6 January 2020 through 10 January 2020
ER -