Surface/Fluid Interactions in Micro and Nano-Channels

Abstract

This research project investigates the dynamics of surface/fluid interactions that occur in micro- and nano-channels. For example, micron-resolution particle image velocimetry (micro-PIV) results suggest that a hydrophilic fluid flowing over a solid hydrophobic surface in micro- and nano-channels can create slip flow whereby the no-slip boundary condition may not be valid. The slip flow may be a result of a low-viscosity nanoscale gaseous layer forming between the fluid and the microchannel surface. The microscale allows for free-surfaces to be controlled by surface tension. The free-surface fluidic architecture can be combined with Surface-Enhanced Raman Spectroscopy (SERS) to allow the real-time profiling of atmospheric species and detection of airborne agents. The system has been used to detect 4-aminobenzenethiol, a chemical species similar in size and structure to trinitrotoluene (TNT).

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Document Details

Document Type
Technical Report
Publication Date
May 15, 2007
Accession Number
ADA469739

Entities

People

  • Carl D Meinhart

Organizations

  • University of California, Santa Barbara

Tags

Communities of Interest

  • Air Platforms
  • Autonomy
  • Counter IED
  • Sensors

DTIC Thesaurus Topics

  • Aircrafts
  • Chemistry
  • Detection
  • Detectors
  • Explosives
  • Fluid Flow
  • Fluidics
  • Fluids
  • Hydrophobic Properties
  • Materials
  • Materials Science
  • Measurement
  • Physical Properties
  • Raman Spectroscopy
  • Slip Flow
  • Surface Plasmon Resonance
  • Surface Tension

Fields of Study

  • Environmental science

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Fluid Mechanics and Fluid Dynamics.
  • Nanocomposite Materials Science