Microscale Heat Transfer
- 450 Downloads
In this chapter, we present the fundamental aspects of microscale heat transfer for gas flow through different geometries. Such a study is motivated by interest in cooling of electronic components, energy conversion devices, and other MEMS and bio-medical applications. The heat transfer at microscale is different than that of macroscale primarily due to the presence of velocity slip and temperature jump at the wall. The physics pertinent to microscale heat transfer is reasonably complex and solutions of various simplified models are available in the literature. Here we confine our presentation to the slip flow regime for flow through three configurations: parallel plates, microtube, and micro-annulus. We also briefly discuss the effect of other complicating factors and comment on comparison with experiments. A discussion on Knudsen pump and useful empirical correlations are also provided.
- 77.Inman RM (1964) Laminar slip flow heat transfer in a parallel-plate channel or a round tube with uniform wall heating. NASA Technical note D-2393. National Aeronautics and Space Administration, Washington, DCGoogle Scholar
- 82.Kennard EH (1938) Kinetic theory of gases with an introduction to statistical mechanics. McGraw-Hill, New YorkGoogle Scholar
- 100.Moharana MK, Khandekar S (2013) Effect of aspect ratio of rectangular microchannels on the axial back conduction in its solid substrate. Int J Microscale Nanoscale Thermal Fluid Transp Phenom 4(3/4):211Google Scholar
- 121.Rohsenow WM, Hartnett JP, Cho YI (1998) Handbook of heat transfer, vol 3. McGraw-Hill, New YorkGoogle Scholar