Qualitative analysis of the minimum flow rate of a cone-jet of a very polar liquid

Higuera Antón, Francisco (2017). Qualitative analysis of the minimum flow rate of a cone-jet of a very polar liquid. "Journal of Fluid Mechanics", v. 816 ; pp. 428-441. ISSN 0022-1120. https://doi.org/10.1017/jfm.2017.111.

Description

Title: Qualitative analysis of the minimum flow rate of a cone-jet of a very polar liquid
Author/s:
  • Higuera Antón, Francisco
Item Type: Article
Título de Revista/Publicación: Journal of Fluid Mechanics
Date: April 2017
Volume: 816
Subjects:
Freetext Keywords: Drops and bubbles, electrohydrodynamic effects
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Mecánica de Fluidos y Propulsión Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Electrostatic atomization of a liquid of finite electrical conductivity in the so-called cone-jet regime relies on the electric shear stresses that appear in a region of the liquid surface when a meniscus of the liquid is subjected to an intense electric field. An order of magnitude analysis is used to describe the flow induced by these stresses, which drive the liquid of the meniscus into a jet that issues from the tip of the meniscus and breaks into droplets at some distance from it. When the dielectric constant of the liquid is large, the electric shear stresses extend into the jet and cause a depression that sucks liquid from the meniscus. The induced flow rate is estimated and shown to represent approximately the minimum flow rate at which a cone-jet can be established. It is argued that the meniscus can be stabilized by the electric field that the charge of the jet induces on it. This stabilizing mechanism weakens when the flow rate supplied to the meniscus decreases, and its failure may determine an alternative minimum flow rate for the cone-jet regime. The instability of the jet and existing scaling laws for the size of the spray droplets are discussed.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainDPI2013-47372-C02-02UnspecifiedUnspecifiedUnspecified
Government of SpainDPI2015-71901-REDTUnspecifiedUnspecifiedUnspecified

More information

Item ID: 49807
DC Identifier: http://oa.upm.es/49807/
OAI Identifier: oai:oa.upm.es:49807
DOI: 10.1017/jfm.2017.111
Official URL: https://doi.org/10.1017/jfm.2017.111
Deposited by: Memoria Investigacion
Deposited on: 01 Aug 2018 10:36
Last Modified: 25 Mar 2019 08:08
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