Electrohydrodynamic tip streaming and emission of charged drops from liquid cones

Autor:	Robert T. Collins, Osman A. Basaran, Jeremy J. Jones, Michael T. Harris
Rok vydání:	2007
Předmět:	Physics::Fluid Dynamics Physics Jet (fluid) Condensed matter physics Electric field Fluid dynamics Optical physics General Physics and Astronomy Conical surface Electrohydrodynamics Mechanics Plasma Physicist
Zdroj:	Nature Physics. 4:149-154
ISSN:	1745-2481 1745-2473
DOI:	10.1038/nphys807
Popis:	When a liquid is subject to a sufficiently strong electric field, it can be induced to emit thin fluid jets from conical tip structures that form at its surface. Such behaviour has both fundamental and practical implications, from raindrops in thunderclouds to pendant drops in electrospray mass spectrometry. But the large difference in length scales between these microscopic/nanoscopic jets and the macroscopic drops and films from which they emerge has made it difficult to model the electrohydrodynamic (EHD) processes that govern such phenomena. Here, we report simulations and experiments that enable a comprehensive picture of the mechanisms of cone formation, jet emission and break-up that occur during EHD tip streaming from a liquid film of finite conductivity. Simulations show that EHD tip streaming does not occur if the liquid is perfectly conducting or perfectly insulating, and enable us to develop a scaling law to predict the size of the drops produced from jet break-up.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e3f8a6190a0553f1d2122198c10b1e11 https://doi.org/10.1038/nphys807 Zobrazit plný text záznamu