Highly focused supersonic microjets: numerical simulations


By focusing a laser pulse inside a capillary partially filled with liquid, a vapour bubble is created which 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 boundaryintegral 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.



Micro-/Nano-fluid dynamics: Microfluidics, Wakes/Jets: Wakes/Jets


Copyright 2012 Journal of Fluid Mechanics. This is a pre-print version of a publisher paper that is available at: https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/highly-focused-supersonic-microjets-numerical-simulations/7A9E524D0031CDC97ADC24AC356AAE5A Recommended citation: PETERS, IVO R., YOSHIYUKI TAGAWA, NIKOLAI OUDALOV, CHAO SUN, ANDREA PROSPERETTI, and DETLEF LOHSE. "Highly focused supersonic microjets: numerical simulations." arXiv preprint arXiv:1203.5029 (2012). This item has been deposited in accordance with publisher copyright and licensing terms and with the author’s permission.