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Instability Modes During Electro-Atomisation for Micro/Nano Particle Fabrication: A Non-Dimensional Approach

[+] Author Affiliations
Alok Ray, P. K. Panigrahi

IIT Kanpur, Kanpur, India

P. Shukla

IIT BHU, Varanasi, India

Paper No. FEDSM2013-16625, pp. V01CT27A007; 10 pages
doi:10.1115/FEDSM2013-16625
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

Various flow instabilities are present during the electro-atomization process, which influence the nature of the particles generated. There is no universal law for describing the complete electro atomization phenomena. The present study reports the detailed non-dimensional analysis of the problem. Three sets of dependent variables are used during dimensional analysis by Buckingham’s pi theorem, and compared with the variables obtained from the Navier Stokes equation. Flow visualization is used to demonstrate different instability modes. These instability modes are related to the nature and size of the particles. Various fluids having different physical and electrical properties are used. A highly viscous organic polymer like polycaprolactone and a highly conductive inorganic sodium silicate solution are used. Water, ethanol and ethylene glycol are also used for detailed parametric analysis.

Copyright © 2013 by ASME

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