Articles producció científica> Enginyeria Química

Electrosprays in the cone-jet mode: From Taylor cone formation to spray development

  • Identification data

    Identifier: imarina:5133228
    Authors:
    Rosell-Llompart J, Grifoll J, Loscertales I
    Abstract:
    Electrospray is a relatively mature research field, with sustained and growing activity. It has attracted researchers from diverse application fields. Electrospray is perhaps best known as a tool which has enabled the mass spectrometry analysis of large biomolecules (proteins and DNA). It has also been proposed as a colloidal thruster for spacecraft propulsion. And also, it has been used as a general methodology for converting precursor droplets to microspheres and other particle morphologies and films, with controlled nanostructure. In parallel to this body of applied research, other efforts have been aimed at improving the understanding of the underlying physics of electrosprays. While many reviews exist on applications of this system, wherein the physics of the process is described to a certain extent, the present review focuses on the fundamentals. We begin by describing the different modes developing in liquid menisci to which an electrical potential is applied. Due to its applications, the mode of greatest interest is the cone-jet mode in which a steady microscopic jet is emitted and breaks up periodically into uniformly sized droplets. The physics of this mode is then explored in detail, first by reviewing the remarkable effort in the field aimed at identifying so called scaling laws. These are simple scaling relationships connecting the variables of the problem which can be applicable to many operating conditions. We then describe the dynamics of generation of the jet which emerges from the electrified conical meniscus, as well as the physics associated with the spray plume development. We conclude with the extension of these concepts to multi-fluid configurations, such as coaxial and parallel flows.
  • Others:

    Author, as appears in the article.: Rosell-Llompart J, Grifoll J, Loscertales I
    Department: Enginyeria Química
    URV's Author/s: GRIFOLL TAVERNA, JORDI / Rosell Llompart, Joan
    Keywords: Electrospray Electrohydrodynamic atomisation Electro-hydrodynamic modes Ehda Cone-jets Coaxial electrospraying Charged droplets
    Abstract: Electrospray is a relatively mature research field, with sustained and growing activity. It has attracted researchers from diverse application fields. Electrospray is perhaps best known as a tool which has enabled the mass spectrometry analysis of large biomolecules (proteins and DNA). It has also been proposed as a colloidal thruster for spacecraft propulsion. And also, it has been used as a general methodology for converting precursor droplets to microspheres and other particle morphologies and films, with controlled nanostructure. In parallel to this body of applied research, other efforts have been aimed at improving the understanding of the underlying physics of electrosprays. While many reviews exist on applications of this system, wherein the physics of the process is described to a certain extent, the present review focuses on the fundamentals. We begin by describing the different modes developing in liquid menisci to which an electrical potential is applied. Due to its applications, the mode of greatest interest is the cone-jet mode in which a steady microscopic jet is emitted and breaks up periodically into uniformly sized droplets. The physics of this mode is then explored in detail, first by reviewing the remarkable effort in the field aimed at identifying so called scaling laws. These are simple scaling relationships connecting the variables of the problem which can be applicable to many operating conditions. We then describe the dynamics of generation of the jet which emerges from the electrified conical meniscus, as well as the physics associated with the spray plume development. We conclude with the extension of these concepts to multi-fluid configurations, such as coaxial and parallel flows.
    Thematic Areas: Química Pollution Meteorology & atmospheric sciences Mechanical engineering Materials science (miscellaneous) General materials science Fluid flow and transfer processes Environmental sciences Environmental engineering Environmental chemistry Engineering, mechanical Engineering, chemical Atmospheric science
    ISSN: 00218502
    Author's mail: joan.rosell@urv.cat
    Author identifier: 0000-0002-5288-9150
    Last page: 31
    Record's date: 2024-09-07
    Journal volume: 125
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S0021850217304366
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Journal Of Aerosol Science. 125 2-31
    APA: Rosell-Llompart J, Grifoll J, Loscertales I (2018). Electrosprays in the cone-jet mode: From Taylor cone formation to spray development. Journal Of Aerosol Science, 125(), 2-31. DOI: 10.1016/j.jaerosci.2018.04.008
    Article's DOI: 10.1016/j.jaerosci.2018.04.008
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2018
    First page: 2
    Publication Type: Journal Publications
  • Keywords:

    Atmospheric Science,Engineering, Chemical,Engineering, Mechanical,Environmental Chemistry,Environmental Engineering,Environmental Sciences,Fluid Flow and Transfer Processes,Materials Science (Miscellaneous),Mechanical Engineering,Meteorology & Atmospheric Sciences,Pollution
    Electrospray
    Electrohydrodynamic atomisation
    Electro-hydrodynamic modes
    Ehda
    Cone-jets
    Coaxial electrospraying
    Charged droplets
    Química
    Pollution
    Meteorology & atmospheric sciences
    Mechanical engineering
    Materials science (miscellaneous)
    General materials science
    Fluid flow and transfer processes
    Environmental sciences
    Environmental engineering
    Environmental chemistry
    Engineering, mechanical
    Engineering, chemical
    Atmospheric science
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