In this work we describe the manufacturing and characterization of multi-scale patterned heterogeneous wettability surfaces. We find drastic enhancements of the pool boiling performance in water. Compared to a hydrophilic SiO2 surface with a wetting angle of 7°, we find that surfaces combining superhydrophilic and superhydrophobic patterns can increase the heat transfer coefficient (HTC) by 300% and can increase the critical heat flux (CHF) by more than 100%.

Volume Subject Area:
Boiling and Condensation
Topics:
Boiling, Critical heat flux, Heat transfer, Heat transfer coefficients, Manufacturing, Pool boiling, Water, Wetting
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Copyright © 2011
 by ASME
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