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Electrically rotating suspended films of polar liquids

Shirsavar, R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s00348-010-0938-5
  3. Abstract:
  4. Controlled rotation of a suspended soap water film, simply generated by applying an electric field, has been reported recently. The film rotates when the applied electric field exceeds a certain threshold. In this study, we investigate the phenomenon in films made of a number of other liquids with various physical and chemical properties. Our measurements show that the intrinsic electrical dipole moments of the liquid molecules seems to be vital for the corresponding film rotation. All the investigated rotating liquids have a molecular electric dipole moment of above 1 Debye, while weakly polar liquids do not rotate. However, the liquids investigated here cover a wide range of physical parameters (e.g. viscosity, density, conductivity, etc.). So far, no significant correlation has been observed between the electric field thresholds and macroscopic properties of the liquids
  5. Keywords:
  6. Applied electric field ; Electrical dipoles ; Liquid molecules ; Macroscopic properties ; Physical and chemical properties ; Physical parameters ; Polar liquids ; Rotating liquids ; Suspended films ; Water film ; Chemical properties ; Electric dipole moments ; Electric fields ; Electric properties ; Liquids ; Rotation ; Density of liquids
  7. Source: Experiments in Fluids ; Volume 50, Issue 2 , August , 2011 , Pages 419-428 ; 07234864 (ISSN)
  8. URL: http://link.springer.com/article/10.1007%2Fs00348-010-0938-5