NDLI: A novel technique for producing metallic microjets and microdrops

Content Provider	Springer Nature Link
Author	Vega, E. J. Gañán Calvo, A. M. Montanero, J. M. Cabezas, M. G. Herrada, M. A.
Copyright Year	2012
Abstract	A new technique for producing steady metallic jets is proposed. It allows the production of supercritical jets with Weber numbers well below unity, which entails important technological advantages over existing techniques. The metallic liquid is injected through a micrometer converging nozzle located inside a gas stream. Both the liquid jet and the coflowing gas current cross an orifice located in front of the nozzle. The gas stream stabilizes the jet by sweeping away the capillary waves growing on the free surface. In this way, one can steadily produce microjets with a kinetic energy much lower than the interfacial energy, a possibility that has been predicted theoretically (Gañán-Calvo in Phys Rev E 78:026304, 2008). Experiments were conducted with mercury to assess the performance of the new technique. The experimental results agreed remarkably well with the predictions calculated from the convective/absolute instability transition of the jet. The jet breakup mechanism did not correspond to classical Rayleigh instability, but to the growth of surface waves over a capillary column which ends at a fixed location. The results were compared with those obtained with the well-established flow focusing method to show that the new technique considerably favors the jet’s stability.
Starting Page	101
Ending Page	111
Page Count	11
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	14
Issue Number	1-2
e-ISSN	16134990
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Surf-jetting Metallic microjets Coflowing systems Additive manufacturing Flow focusing Engineering Fluid Dynamics Biomedical Engineering Analytical Chemistry Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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