電解質溶液在表面覆蓋離子可穿透薄膜之微管中的流動(3/3)
Date Issued
2004
Date
2004
Author(s)
DOI
922214E002001
Abstract
The electrokinetic flow of an electrolyte
solution in an elliptical microchannel
covered by an ion-penetrable charged
membrane layer is examined theoretically.
The present analysis extends previous results
in that a two-dimensional problem is
considered. The system under consideration
simulates the flow of a fluid, for example, in
vein. The electroosmostic volumetric flow
rate, the total electric current, the streaming
potential, and the electroviscous effect of the
system under consideration are evaluated.
We show that, for a constant hydraulic
diameter, the variations of these quantities as
a function of the aspect ratio of the
microchannel may have a local minimum or
a local maximum at a medium level of ionic
strength, which depends on the thickness of
the membrane layer. For a constant
cross-sectional area, the electroosmostic
volumetric flow rate, the total electric current,
and the streaming potential increase
monotonically with an increase in the aspect
ratio. The electroviscous effect decreases
monotonically with an increase in the aspect ratio.
Subjects
microchannel
electrokinetic
phenomenon
phenomenon
electroviscous effect
aspect
ratio
ratio
Publisher
臺北市：國立臺灣大學化學工程學系暨研究所
Type
report
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