0

Full Content is available to subscribers

Subscribe/Learn More  >

Measurement of Liquid Slip on Nanoturf Surfaces

[+] Author Affiliations
Chang-Hwan Choi, Chang-Jin Kim

University of California at Los Angeles, Los Angeles, CA

Paper No. NANO2005-87079, pp. 59-60; 2 pages
doi:10.1115/NANO2005-87079
From:
  • ASME 4th Integrated Nanosystems Conference
  • Design, Synthesis, and Applications
  • Berkeley, California, USA, September 12–14, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4208-8 | eISBN: 0-7918-3771-8
  • Copyright © 2005 by ASME

abstract

While many new studies have confirmed the existence of liquid slip over certain solid surfaces [1], there has not been a deliberate effort to design and fabricate a surface that will maximize the slip effect and reduce drag in liquid flow in practical conditions. Hydrophobic rough surfaces have been studied experimentally to reduce the friction in liquid flow [2, 3]. The fine grooves [2], trapping air in them, were speculated to decrease the liquid-solid contact area and contribute to the drag reduction. However, the grooves constitute only a fraction of the entire surface and the rest of the surface is also rough, making it difficult to isolate and attribute the effect of the air layer. Although the post structures with large pitches (i.e., over several microns) [3] may be convenient to fabricate and more convincing to demonstrate the drag reduction, they function only under small liquid pressure (e.g., < 5000 Pa), which does not represent most real flow conditions. Although the nano-patterned surfaces have recently been shown to reduce the friction even under high pressure [4, 5], the amount of slip is not large enough to generate a meaningful drag reduction. Hence, our goal, extended from the previous report for droplet flows [6], is to engineer a surface that maximizes the slip effect for continuous flows in real engineering cases when the liquid is considerably pressurized.

Copyright © 2005 by ASME

Figures

Tables

Interactive Graphics

Video

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

NOTE:
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