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Axis-switching of a micro-jet
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    1 Fluid dynamics Laboratory, Faculty of Engineering, University of Buenos Aires, Av. Paseo Colón 850, Buenos Aires, Argentina and Micro and Nanofluidics and Plasma Laboratory, Faculty of Engineering, Marina Mercante University, Av. Rivadavia 2258, Buenos Aires, Argentina
    2 Laboratoire de Physique et Mécanique des Milieux Hétérogènes (PMMH), UMR7636 CNRS, Université Pierre et Marie Curie (UPMC), Université Paris Diderot (UPD), École supérieure de physique et de chimie industrielles (ESPCI), de la Ville de Paris, 10 rue Vauquelin, 75231 Paris Cedex 05, France
    Phys. Fluids 26, 031702 (2014); http://dx.doi.org/10.1063/1.4868256
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/content/aip/journal/pof2/26/3/10.1063/1.4868256
2014-03-11
2014-08-29

Abstract

In this study, it is shown that free microjets can undergo complex transitions similar to large-scale free jets despite relatively low Reynolds numbers. Using an original experimental method allowing for the 3D reconstruction of the instantaneous spatial organization of the microjet, the axis-switching of a micro-jet is observed for the first time. This is the first experimental evidence of such complex phenomena for free micro-jets. Combining these experimental results with Direct Numerical Simulations it is shown that the mechanism responsible for the axis-switching is the deformation of a micro-vortex ring due to induction by the corner vortices, as it occurs in large scale non-circular jets.

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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Axis-switching of a micro-jet
http://aip.metastore.ingenta.com/content/aip/journal/pof2/26/3/10.1063/1.4868256
10.1063/1.4868256
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