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TECHNICAL PAPERS

Constant-Wall-Temperature Nusselt Number in Micro and Nano-Channels

[+] Author and Article Information
Nicolas G. Hadjiconstantinou, Olga Simek

Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Heat Transfer 124(2), 356-364 (Aug 21, 2001) (9 pages) doi:10.1115/1.1447931 History: Received April 06, 2001; Revised August 21, 2001
Copyright © 2002 by ASME
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References

Figures

Grahic Jump Location
Comparison between the theoretical prediction of Eq. (26) denoted by a solid line, the slip-flow result (28) with α=1.1 denoted by a dashed line, and the simulation results denoted by stars.
Grahic Jump Location
Variation of Nusselt number NuTs with Knudsen number Kn for air in the fully accommodating case. The solid line denotes Pe→0, the dashed line Pe=0.2, the dash-dotted line Pe=1, the line with crosses Pe=5, and the line with stars Pe→∞.
Grahic Jump Location
Variation of Nusselt number NuTs with Knudsen number Kn for air for various values of the thermal accommodation coefficient σT with σv=1. The solid lines denote Pe=1, and the dashed lines Pe=0.1.
Grahic Jump Location
Variation of Nusselt number NuT with Knudsen number Kn for air for various values of the accommodation coefficients for Pe=1. The solid lines denote σv=1, and the dashed lines σv=0.9.
Grahic Jump Location
Variation of Nusselt number NuTs with Knudsen number Kn for Pe=0, σvT=1, for air (solid line) and hard sphere gas (dashed line).
Grahic Jump Location
Variation of Nusselt number NuT with Knudsen number Kn. The stars denote DSMC simulation data with To>Ti and circles denote DSMC simulation data with Ti>To. The solid lines denote hard sphere slip-flow results for Pe=0.01, 0.1, and 1.0 which are virtually indistinguishable.
Grahic Jump Location
Variation of Nusselt number NuTD with Knudsen number KnD for air in the fully accommodating case. The solid line denotes PeD→∞, the dashed line PeD=5, the dash-dotted line PeD=1, the line with dots PeD=0.2 and the line with stars PeD→0.
Grahic Jump Location
Variation of Nusselt number NuTD with Knudsen number KnD for air for various values of the thermal accommodation coefficient σT with σv=1. The solid lines denote PeD=1, and the dashed lines PeD=0.1.
Grahic Jump Location
Variation of Nusselt number NuTD with Knudsen number KnD for air for various values of the accommodation coefficients for PeD=1. The solid lines denote σv=1, and the dashed lines σv=0.9.

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