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A Very stable high throughput taylor cone-jet in electrohydrodynamics

Morad, M. R ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1038/srep38509
  3. Publisher: Nature Publishing Group , 2016
  4. Abstract:
  5. A stable capillary liquid jet formed by an electric field is an important physical phenomenon for formation of controllable small droplets, power generation and chemical reactions, printing and patterning, and chemical-biological investigations. In electrohydrodynamics, the well-known Taylor cone-jet has a stability margin within a certain range of the liquid flow rate (Q) and the applied voltage (V). Here, we introduce a simple mechanism to greatly extend the Taylor cone-jet stability margin and produce a very high throughput. For an ethanol cone-jet emitting from a simple nozzle, the stability margin is obtained within 1 kV for low flow rates, decaying with flow rate up to 2 ml/h. By installing a hemispherical cap above the nozzle, we demonstrate that the stability margin could increase to 5 kV for low flow rates, decaying to zero for a maximum flow rate of 65 ml/h. The governing borders of stability margins are discussed and obtained for three other liquids: methanol, 1-propanol and 1-butanol. For a gravity-directed nozzle, the produced cone-jet is more stable against perturbations and the axis of the spray remains in the same direction through the whole stability margin, unlike the cone-jet of conventional simple nozzles
  6. Keywords:
  8. Source: Scientific Reports ; Volume 6 , 2016 ; 20452322 (ISSN)
  9. URL: http://www.nature.com/articles/srep38509