NDLI: The Effect of Viscous Dissipation on Two-Dimensional Microchannel Heat Transfer

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Rij, Jennifer Van Ameel, Tim Harman, Todd
Copyright Year	2006
Abstract	Microchannel convective heat transfer characteristics in the slip flow regime are numerically evaluated for two-dimensional, steady state, laminar, constant wall heat flux and constant wall temperature flows. The effects of Knudsen number, accommodation coefficients, viscous dissipation, pressure work, second-order slip boundary conditions, axial conduction, and thermally/hydrodynamically developing flow are considered. The effects of these parameters on microchannel convective heat transfer are compared through the Nusselt number. Numerical values for the Nusselt number are obtained using a continuum based three-dimensional, unsteady, compressible computational fluid dynamics algorithm that has been modified with slip boundary conditions. Numerical results are verified using analytic solutions for thermally and hydrodynamically fully developed flows. The resulting analytical and numerical Nusselt numbers are given as a function of Knudsen number, the first- and second-order velocity slip and temperature jump coefficients, the Peclet number, and the Brinkman number. Excellent agreement between numerical and analytical data is demonstrated. Viscous dissipation, pressure work, second-order slip terms, and axial conduction are all shown to have significant effects on Nusselt numbers in the slip flow regime.
Sponsorship	Microelectromechanical Systems Division
Starting Page	497
Ending Page	505
Page Count	9
File Format	PDF
ISBN	0791847756
DOI	10.1115/IMECE2006-16121
e-ISBN	0791837904
Volume Number	Microelectromechanical Systems
Conference Proceedings	ASME 2006 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2006-11-05
Publisher Place	Chicago, Illinois, USA
Access Restriction	Subscribed
Subject Keyword	Slip flow Temperature Computational fluid dynamics Flow (dynamics) Pressure Steady state Convection Heat flux Microchannels Heat conduction Wall temperature Knudsen number Algorithms Energy dissipation Boundary-value problems Heat transfer
Content Type	Text
Resource Type	Article

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