Abstract
We investigated the shape of the liquid-liquid interface in micro counter-current flows formed within microchannels. The pressure balance at the interface was calculated based on the interface geometry. Although the shape should be an arc under laminar flow, a large deformation near the center of the microchannel was observed. In the center of the microchannel, Laplace pressure (171 - 450 Pa) was induced toward the aqueous phase. In contrast, near both sidewalls, Laplace pressure (81 - 166 Pa) was induced toward the organic phase. This result suggests that opposing flow occurs in the adjacent phases near the interface, with spiral-like flow generation.
Original language | English |
---|---|
Pages (from-to) | 9-12 |
Number of pages | 4 |
Journal | analytical sciences |
Volume | 28 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2012 |
Externally published | Yes |
ASJC Scopus subject areas
- Analytical Chemistry