|
Original
Effect of Applied Parallel Electric Field on Electroosmotic Flow in Donut Channel |
| Tamio Fujiwara1), Osami Kitoh2) and Takao Tsuda3) |
1)Graduate School of Engineering, Nagoya Institute of Technology Gokiso, Showa, Nagoya 466-8555, Japan
2)Department of Mechanical Engineering, Nagoya Institute of Technology Gokiso, Showa, Nagoya 466-8555, Japan
3)Department of Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa, Nagoya 466-8555, Japan |
Abstract:
The influence of an electric field parallel to a silica-water interface on electroosmosis was studied by using a precisely manufactured apparatus.
In this study, a donut channel constructed by a gap between two parallel donut-shaped glass plates was used for generating an electroosmotic
flow of water. After adjusting the pressure gradient in the channel to zero, the electroosmotic flow rate was measured by an original
micro-flow meter in the range of 0.1 to 2 [mm3/sec]. It was shown that there were three different tendencies of the electroosmotic flow rate on
the applied electric field. We supposed these differences were derived from the variation of the zeta potential with the electric field: decreasing,
increasing and approaching constant. It was also shown that the variations in electroosmosis with the electric field had a relation to that of
the electric current in the channel.
|
| Keywords: | Electroosmosis, Electroosmotic flow, Electric double layer, Zeta potential, Electric current |
|
|
|
