CONVECTIVE HEAT TRANSFER IN MICROSCALE SLIP FLOW

Date

2009-09-04

Author

Güvenç Yazıcıoğlu, Almıla
KAKAÇ, SADIK

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In this lecture, steady-state convective heat transfer in different microchannels (microtube and parallel plates) will be presented in the slip flow regime. Laminar, thermally and/or hydrodynamically developing flows will be considered. In the analyses, in addition to rarefaction, axial conduction, and viscous dissipation effects, which are generally neglected in macroscale problems, surface roughness effects, and temperature-variable thermophysical properties of the fluid will also be taken into consideration. Navier-Stokes and energy equations will be solved and the variation of Nusselt number, the dimensionless parameter for convection heat transfer, along the channels will be presented in tabular and graphical forms as a function of Knudsen, Peclet, and Brinkman numbers, which represent the effects of rarefaction, axial conduction, and viscous dissipation, respectively. The results will be compared and verified with available experimentalanalytical, and numerical solutions in literature.

Subject Keywords

Fluid-flow, Laminar-flow, Wall roughness, Axial conduction, Surface-roughness, Numerical-simulation, Liquid flow, Pressure-drop, Graetz problem, Viscous dissipation

URI

https://hdl.handle.net/11511/37657

Collections

Department of Mechanical Engineering, Conference / Seminar