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Highly focused supersonic microjets: numerical simulations

Published online by Cambridge University Press:  19 February 2013

Ivo R. Peters ,
Yoshiyuki Tagawa ,
Nikolai Oudalov ,
Chao Sun ,
Andrea Prosperetti ,
Detlef Lohse  and
Devaraj van der Meer
Ivo R. Peters*
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Yoshiyuki Tagawa
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Nikolai Oudalov
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Chao Sun
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Andrea Prosperetti
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
Detlef Lohse
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Devaraj van der Meer
Affiliation:
Department of Science and Technology, Mesa+, and J. M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
*
†Email address for correspondence: [email protected]
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Abstract

By focusing a laser pulse inside a capillary partially filled with liquid, a vapour bubble is created that emits a pressure wave. This pressure wave travels through the liquid and creates a fast, focused axisymmetric microjet when it is reflected at the meniscus. We numerically investigate the formation of this microjet using axisymmetric boundary integral simulations, where we model the pressure wave as a pressure pulse applied on the bubble. We find a good agreement between the simulations and experimental results in terms of the time evolution of the jet and on all parameters that can be compared directly. We present a simple analytical model that accurately predicts the velocity of the jet after the pressure pulse and its maximum velocity.

JFM classification

Wakes/Jets: Jets Micro-/Nano-fluid dynamics: Microfluidics Wakes/Jets: Wakes/Jets
Type
Papers
Information
Journal of Fluid Mechanics , Volume 719 , 25 March 2013 , pp. 587 - 605
Copyright
©2013 Cambridge University Press

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