Artículo
Experimental and numerical study of the recirculation flow inside a liquid meniscus focused by air
Autor/es | Gañán-Calvo, Alfonso M.
Ferrera, C. Torregrosa, M. Herrada Gutiérrez, Miguel Ángel Marchand, M. |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos |
Fecha de publicación | 2011 |
Fecha de depósito | 2020-11-06 |
Publicado en |
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Resumen | The internal motions inside a liquid meniscus
in the so-called liquid cone-jet mode, which can occur
upon stimulation by a coflowing gas sheath in flow
focusing, are explored by both numerical simulation and
experimental ... The internal motions inside a liquid meniscus in the so-called liquid cone-jet mode, which can occur upon stimulation by a coflowing gas sheath in flow focusing, are explored by both numerical simulation and experimental visualization. The results for low viscosity liquids show that, as in previous numerical simulations, a recirculating cell inside the meniscus appears when the injected liquid flow rate is reduced. Thus, as the flow rate is reduced not only the average residence time of particles in the meniscus becomes longer, but the appearance of a recirculation cell provides a natural platform for the efficient micro-mixing of different species before they are ejected through the issuing jet. The numerical results were confirmed with experimental visualization of the flow inside the meniscus using a dyed liquid. However, when the viscosity of the liquid is increased the recirculating cell disappears. In this case, viscous stresses organize the streamlines and direct the flow to the meniscus tip, which prevents the recirculating cell from being formed even for very small injected rate of liquid flow. |
Identificador del proyecto | DPI2007-63559
GRU07003 P08-TEP-04128 |
Cita | Gañán-Calvo, A.M., Ferrera, C., Torregrosa, M., Herrada Gutiérrez, M.Á. y Marchand, M. (2011). Experimental and numerical study of the recirculation flow inside a liquid meniscus focused by air. Microfluidics and Nanofluidics, 11 (1), 65-74. |
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