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The onset of electrospray: the universal scaling laws of the first ejection

Opened Access The onset of electrospray: the universal scaling laws of the first ejection

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Autor: Gañán Calvo, Alfonso Miguel
López-Herrera Sánchez, José María
Rebollo Muñoz, N.
Montanero Fernández, José María
Departamento: Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos
Fecha: 2016
Publicado en: Scientific Reports, 6 (32357)
Tipo de documento: Artículo
Resumen: The disintegration of liquid drops with low electrical conductivity and subject to an electric field is investigated both theoretically and experimentally. This disintegration takes place through the development of a conical cusp that eventually ejects an ultrathin liquid ligament. A first tiny drop is emitted from the end of this ligament. Due to its exceptionally small size and large electric charge per unit volume, that drop has been the object of relevant recent studies. In this paper, universal scaling laws for the diameter and electric charge of the first issued droplet are proposed and validated both numerically and experimentally. Our analysis shows how charge relaxation is the mechanism that differentiates the onset of electrospray, including the first droplet ejection, from the classical steady cone-jet mode. In this way, our study identifies when and where charge relaxation and electrokinetic phenomena come into play in electrospray, a subject of live controversy i...
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Cita: Gañán Calvo, A.M., López-Herrera Sánchez, J.M., Rebollo Muñoz, N. y Montanero Fernández, J.M. (2016). The onset of electrospray: the universal scaling laws of the first ejection. Scientific Reports, 6 (32357)
Tamaño: 1.323Mb
Formato: PDF

URI: https://hdl.handle.net/11441/69945

DOI: 10.1038/srep32357

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