Title: Critical heat flux of pool boiling on Si nanowire array-coated surfaces
Authors: Lu, Ming-Chang
Chen, Renkun
Srinivasan, Vinod
Carey, Van P.
Majumdar, Arun
機械工程學系
Department of Mechanical Engineering
Keywords: Pool boiling;Critical heat flux;Nanowires;Hydrodynamics
Issue Date: 1-Dec-2011
Abstract: Pool boiling of saturated water on plain Si surfaces and surfaces covered with a dense array of Si nanowires (SiNWs) has been studied. Measured CHF and heat transfer coefficient (HTC) values of about 223 +/- 5.61 W/cm(2) and 9 +/- 1.60 W/cm(2) K. respectively, on the nanowire array-coated surface are among the highest reported in boiling heat transfer. Meanwhile, the CHFs on both nanowire-coated and Plain Si surfaces show a similar heater size dependence - the CHF increases as heater size decreases. The measured CHFs on both types of surfaces are approximately following the prediction of the hydrodynamic theory assuming the Helmholtz wavelength equal to the corresponded heater length. It suggests that the CHFs on both types of surfaces might be limited by pool hydrodynamics. (C) 2011 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2011.08.007
http://hdl.handle.net/11536/14637
ISSN: 0017-9310
DOI: 10.1016/j.ijheatmasstransfer.2011.08.007
Journal: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume: 54
Issue: 25-26
Begin Page: 5359
End Page: 5367
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