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TECHNICAL PAPERS

Influence of Three-Dimensional Roughness on Pressure-Driven Flow Through Microchannels

[+] Author and Article Information
Yandong Hu

Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada

Carsten Werner

Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada and Department of Biocompatible Materials, Institute of Polymer Research, Hohe Strasse 6, 01069 Dresden, Germany

Dongqing Li

Department of Mechanical & Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canadae-mail: dli@mie.utoronto.ca

J. Fluids Eng 125(5), 871-879 (Oct 07, 2003) (9 pages) doi:10.1115/1.1598993 History: Received September 12, 2002; Revised April 22, 2003; Online October 07, 2003
Copyright © 2003 by ASME
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References

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Figures

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The roughness arrangements on the homogeneous microchannel wall: (a) symmetrical arrangement and (b) asymmetrical arrangement, and the corresponding computational domains from the top view
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Illustration of flow through a slit microchannel with rectangular prism rough elements on the surfaces
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Illustration of three-dimensional computational grids for the cases (a) symmetrical arrangement and (b) asymmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm, and h=0.5 μm
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The side view of the flow field: (a) streamlines of the symmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm, Re=0.1, and (b) streamlines of the asymmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm
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The top view of the streamlines of (a) the symmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm, and (b) the asymmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm
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The three-dimensional streamlines of (a) the symmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm, and (b) the asymmetrical arrangement with a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm
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The pressure fields: (a) the top view of the symmetrical arrangement, plane Y=0.045; (b) the top view of the asymmetrical arrangement, plane Y=0.045; (c) the side view of the symmetrical arrangement, plane Z=0; and (d) the side view of the asymmetrical arrangement, plane Z=0. All figures have the same parameters set as a=1.0 μm,b=2.0 μm,H=5 μm,h=0.5 μm.
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Nondimensional pressure gradient versus the roughness height with a=1.0 μm,b=2.0 μm, and H=5 μm
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Nondimensional pressure gradient versus the roughness size with h=1.0 μm,b=2 μm, and H=5 μm
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Nondimensional pressure gradient versus the roughness spacing with a=1 μm,h=1 μm, and H=5 μm
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Nondimensional pressure gradient versus the rough microchannel height with h=1.0 μm,a=1.0 μm, and b=2.0 μm

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