Pulsating emission of droplets from an electrified meniscus.

Higuera Antón, Francisco; Ibáñez León, Santiago Enrique; Hijano, A. J. y Loscertales, I. G. (2013). Pulsating emission of droplets from an electrified meniscus.. "Journal of Aerosol Science", v. 66 ; pp. 193-208. ISSN 0021-8502. https://doi.org/10.1016/j.jaerosci.2013.09.001.

Descripción

Título: Pulsating emission of droplets from an electrified meniscus.
Autor/es:
  • Higuera Antón, Francisco
  • Ibáñez León, Santiago Enrique
  • Hijano, A. J.
  • Loscertales, I. G.
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Aerosol Science
Fecha: Diciembre 2013
Volumen: 66
Materias:
Palabras Clave Informales: Electrostatic atomization; Pulsating electrosprays; EHD printing; DC and AC electric forcing
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A numerical description is given for the pulsating emission of droplets from an electrified meniscus of an inviscid liquid of infinite electrical conductivity which is injected at a constant flow rate into a region of uniform, continuous or time periodic, electric field. Under a continuous field, the meniscus attains a periodic regime in which bursts of tiny droplets are emitted from its tip. At low electric fields this regime consists of sequences of emission bursts interspersed with sequences of meniscus oscillations without droplet emission, while at higher fields the bursts occur periodically. These results are in qualitative agreement with experimental results in the literature. Under a time periodic electric field with square waveform, the electric stress that acts on the surface of the liquid while the field is on may generate a tip that emits tiny droplets or may accelerate part of the meniscus and lead to a second emission mode in which a few large droplets are emitted after the electric field is turned off. Conditions under which each emission mode or a combination of the two are realized are discussed for low frequency oscillatory fields. A simplified model is proposed for high electric field frequencies, of the order of the capillary frequency of the meniscus. This model allows computing the average emission rate as a function of the amplitude, duration and bias of the electric field square wave, and shows that droplet emission fails to follow the applied field above a certain frequency

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Comunidad de MadridS2009/ENE-1597Sin especificarSin especificarSin especificar

Más información

ID de Registro: 25723
Identificador DC: http://oa.upm.es/25723/
Identificador OAI: oai:oa.upm.es:25723
Identificador DOI: 10.1016/j.jaerosci.2013.09.001
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0021850213001948
Depositado por: Memoria Investigacion
Depositado el: 28 Oct 2014 16:14
Ultima Modificación: 28 Oct 2014 16:14
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