Laser-generated cavitation in absorbing liquid induced by acoustic diffraction

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.3546· OSTI ID:285676

Frenz, M ^[1]; Paltauf, G; Schmidt-Kloiber, H ^[2]

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1. Institute of Applied Physics, University of Berne, CH-3012 Berne (Switzerland)
2. Institute of Experimental Physics, Karl-Franzens-University Graz, A-8010 Graz (Austria)

Conversion of energy from a heat pulse to acoustic stress is theoretically and experimentally studied in detail. The heat pulse was generated by laser radiation delivered via an optical fiber into an absorbing liquid. The experimental results indicate that tensile stress and cavitation are induced in front of the fiber tip at a distance far below the optical penetration depth of the laser radiation. The occurrence of tensile stress in the acoustic near fieldof a submerged fiber is explained by acoustic diffraction of the thermoelastic expansion wave. Good agreement between experimental results and theoretical calculations based on a three-dimensional model was found. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 285676
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ACOUSTICS
CAVITATION
DIFFRACTION
ENERGY CONVERSION
HEAT PUMPS
LASER RADIATION
LIQUIDS
OPTICAL FIBERS
PENETRATION DEPTH
STRESSES