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.
|Original language||English (US)|
|Number of pages||9|
|Journal||International Journal of Heat and Mass Transfer|
|State||Published - Dec 2011|
Bibliographical noteFunding Information:
This work was supported by Intel Corporation and the UC Discovery program . We thank the UC Berkeley Micro-fabrication Laboratory for the use of their facilities. The authors thank Dr. R.S. Prasher of Advanced Research Projects Agency-Energy and Dr. J.-Y. Chang of Intel for helpful discussions on boiling heat transfer.
Copyright 2012 Elsevier B.V., All rights reserved.
- Critical heat flux
- Pool boiling