Electroosmotic flow in heterogeneous microchannels

被引：95

作者：

Ren, LQ ^{[1
]}

Li, DQ ^{[1
]}

机构：

[1] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2001年 / 243卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

electroosmotic flow; heterogeneous microchannel; bioadhesion; zeta potential;

D O I：

10.1006/jcis.2001.7824

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The characteristics of electroosmotic flow in a cylindrical microchannel with nonuniform zeta potential were investigated in this paper. The Poisson-Boltzmann equation and momentum equation were used to model the electrical double-layer field and the flow field. The numerical results show the distorted electroosmotic ve city profiles resulting from the axial variation of the zeta potential. Also, the influences of the unequal section size and the direction of the zeta potential change on the velocity profile, the induced pressure distribution, and the volumetric flow rate are discussed in this paper. The simulation results revealed possible effects of bioadhesion in microchannels on the electroosmotic flow in biochip devices. (C) 2001 Academic Press.

引用

页码：255 / 261

页数：7

共 14 条

[1]

Anderson DA, 1984, COMPUTATIONAL FLUID

[2] ELECTROOSMOSIS THROUGH PORES WITH NONUNIFORMLY CHARGED WALLS [J].

ANDERSON, JL ;

IDOL, WK .

CHEMICAL ENGINEERING COMMUNICATIONS, 1985, 38 (3-6) :93-106

[3] Electrophoretic separation of small DNA fragments in the presence of electroosmotic flow using poly(ethylene oxide) solutions [J].

Chen, HS ;

Chang, HT .

ANALYTICAL CHEMISTRY, 1999, 71 (10) :2033-2036

[4] Computer simulations of electrokinetic injection techniques in microfluidic devices [J].

Ermakov, SV ;

Jacobson, SC ;

Ramsey, JM .

ANALYTICAL CHEMISTRY, 2000, 72 (15) :3512-3517

[5] Electroosmotic capillary flow with nonuniform zeta potential [J].

Herr, AE ;

Molho, JI ;

Santiago, JG ;

Mungal, MG ;

Kenny, TW ;

Garguilo, MG .

ANALYTICAL CHEMISTRY, 2000, 72 (05) :1053-1057

[6]

Hjerten S, 1967, Chromatogr Rev, V9, P122, DOI 10.1016/0009-5907(67)80003-6

[7]

Hornbeck R. W., 1975, NUMERICAL METHODS

[8]

Hunter R. J., 1988, Zeta Potential in Colloid Science, Principles and Applications, VThird

[9] EFFECTS OF INJECTION SCHEMES AND COLUMN GEOMETRY ON THE PERFORMANCE OF MICROCHIP ELECTROPHORESIS DEVICES [J].

JACOBSON, SC ;

HERGENRODER, R ;

KOUTNY, LB ;

WARMACK, RJ ;

RAMSEY, JM .

ANALYTICAL CHEMISTRY, 1994, 66 (07) :1107-1113

[10] Electroosmotic flows created by surface defects in capillary electrophoresis [J].

Long, D ;

Stone, HA ;

Ajdari, A .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 212 (02) :338-349

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