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Study of the fluid flow in microfabr...

Kulinsky, Lawrence.

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Study of the fluid flow in microfabricated microchannels.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Study of the fluid flow in microfabricated microchannels./
Author:	Kulinsky, Lawrence.
Description:	94 p.
Notes:	Source: Dissertation Abstracts International, Volume: 60-03, Section: B, page: 1255.
Contained By:	Dissertation Abstracts International60-03B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9922916
ISBN:	059922486X

Study of the fluid flow in microfabricated microchannels.
Kulinsky, Lawrence.

Study of the fluid flow in microfabricated microchannels. - 94 p.

Source: Dissertation Abstracts International, Volume: 60-03, Section: B, page: 1255.

Thesis (Ph.D.)--University of California, Berkeley, 1998.

Fluid flow in capillary microchannels is used in numerous applications in biotechnology (such as protein separation, fast DNA analysis, drug deliveries systems and viral filtration), in solid-state devices, and in catalytic devices. The current work presents the experimental validation for the electrokinetic theory in microchannels. Retardation of polar liquids, including de-ionized water, ethanol and propyl alcohol, is studied in microfabricated channels of several diameters.

ISBN: 059922486XSubjects--Topical Terms:

1017759
Engineering, Materials Science.

Study of the fluid flow in microfabricated microchannels.
LDR:02732nmm 2200337 4500 001 1840733
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020 $a 059922486X
035 $a (UnM)AAI9922916
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040 $a UnM $c UnM
100 1 $a Kulinsky, Lawrence. $3 1929058
245 1 0 $a Study of the fluid flow in microfabricated microchannels.
300 $a 94 p.
500 $a Source: Dissertation Abstracts International, Volume: 60-03, Section: B, page: 1255.
500 $a Chair: Mauro Ferrari.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 1998.
520 $a Fluid flow in capillary microchannels is used in numerous applications in biotechnology (such as protein separation, fast DNA analysis, drug deliveries systems and viral filtration), in solid-state devices, and in catalytic devices. The current work presents the experimental validation for the electrokinetic theory in microchannels. Retardation of polar liquids, including de-ionized water, ethanol and propyl alcohol, is studied in microfabricated channels of several diameters.
520 $a It was found that polar liquids flow about 6 percent more slowly than predicted by the classical hydrodynamic theory in microchannels, with the hydraulic diameter equal to 90 microns. For small microchannels with a hydraulic diameter of several microns, observed retardation is on the order of 70 percent. Collected experimental data have good correspondence with the electrokinetic model presented.
520 $a Electrokinetic retardation of polar liquids in microchannels is based on the charge separation principle. Electrical charges are separated at the interface (near the channel wall). When liquid is forced downstream, it causes charge accumulation at one end of the microchannel. The streaming potential produced causes an upstream current that creates upstream counterflow. The resultant fluid flow can be significantly less than it would be for non-polar liquids. The higher the zeta-potential at the microchannel wall and the smaller the channel the larger the resulting retardation. Figure below demonstrates the predictions for electrokinetic retardation in microchannels of several hydraulic diameters.*
520 $a Modifications for the friction factor as applied to microfluidics are suggested. Recommendations to improve fluid flow in microchannels are given.
520 $a *Please refer to dissertation for graph.
590 $a School code: 0028.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Physics, Fluid and Plasma. $3 1018402
650 4 $a Applied Mechanics. $3 1018410
690 $a 0794
690 $a 0759
690 $a 0346
710 2 0 $a University of California, Berkeley. $3 687832
773 0 $t Dissertation Abstracts International $g 60-03B.
790 1 0 $a Ferrari, Mauro, $e advisor
790 $a 0028
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9922916