Full Content is available to subscribers

Subscribe/Learn More  >

Molecular Dynamics Simulation of Electrically-Assisted Spreading of an Ionically Conducting Water Droplet

[+] Author Affiliations
Fenhong Song, Chao Liu

Chongqing University, Chongqing, China

Ben Q. Li

University of Michigan, Dearborn, MI

Paper No. IMECE2013-65345, pp. V07AT08A005; 7 pages
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 7A: Fluids Engineering Systems and Technologies
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5631-4
  • Copyright © 2013 by ASME


Molecular dynamics simulations are performed to study the spreading behavior of a nanosized water droplet that contains freely moving ions subject to an imposed electric field parallel to a solid surface. Results show that positive and negative ions respond to the applied electric field in a different manner, whereas water molecules are polarized by realigning themselves in the electric field. These localized behaviors of the ions and polarized molecules define the droplet deformation and spreading on a solid substrate. Both the ion concentration and the strength of the applied field play an important role in re-alignment of the polarized water molecules and in the movement of ions. The existence of the freely moving ions causes the droplet to spread differently from the pure liquid. It is observed that an ionically conducting water droplet undergoes the asymmetric-to-symmetric spreading transition at about the field strength of 0.05V/Å, which is considerably smaller than the same sized water droplet without ions. Also, the ionically conducting droplet completely wets the solid surface in the presence of a strong electric field.

Copyright © 2013 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In