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Laser-induced break-up of water jet waveguide

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Abstract

In this article, an optical method to control the break-up of high-speed liquid jets is proposed. The method consists of focusing the light of a pulsed laser source into the jet behaving as a waveguide. Experiments were performed with the help of a Q-switched frequency doubled Nd:Yag laser (λ=532 nm). The jet diameter was 48 µm and jet velocities from 100 to 200 m/s. To study the laser-induced water jet break-up, observations of the jet coupled with the high power laser were performed for variable coupling and jet velocity conditions. Experimentally determined wavelength and growth rate of the laser-generated disturbance were also compared with the ones predicted by linear stability theory of free jets.

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Acknowledgements

The authors are grateful to the Commission for Technology and Innovation (KTI/CTI project N5314.3 KTS) for co-financing this work. The experiments have been carried out and supported by the Research and Development laboratory of the company SYNOVA SA where the Laser-Microjet® technology is developed and applied. The authors are very grateful for the collaboration of the director Bernold Richerzhagen and the head of the R&D group Frank Wagner.

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Authors and Affiliations

  1. EPFL/STI/IOA/Advanced Photonics Laboratory, Lausanne BM, 1015, Lausanne, Switzerland

    P. Couty & P. Hoffmann

  2. Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8, 1111, Budapest, Hungary

    Á. Spiegel & N. Vágó

  3. EPFL/STI/IMHEF/Laboratory Fluid Mechanics, Lausanne, 1015, Lausanne, Switzerland

    B. I. Ugurtas

Authors
  1. P. Couty
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  2. Á. Spiegel
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  3. N. Vágó
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  4. B. I. Ugurtas
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  5. P. Hoffmann
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Correspondence to P. Couty.

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Couty, P., Spiegel, Á., Vágó, N. et al. Laser-induced break-up of water jet waveguide. Exp Fluids 36, 919–927 (2004). https://doi.org/10.1007/s00348-003-0775-x

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  • DOI: https://doi.org/10.1007/s00348-003-0775-x

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