Preliminary experiments on nucleate pool boiling using asymmetric micro ratchets with de-ionized (DI) water as the working fluid were investigated. Two brass surfaces were tested for comparison; one surface was manually polished while the second was composed of asymmetric ratchets with 30μm height and 150 μm period. Small test aquariums (114.8 mm × 54 mm × 152.4 mm) were fabricated and tested on a hot plate. Results show that the ratchet surface made significant heat transfer improvements over the polished surface.
Pool Boiling Enhancement via Micro Ratchets
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Brumfield, LA, Ok, JT, & Park, S. "Pool Boiling Enhancement via Micro Ratchets." Proceedings of the ASME 2011 International Mechanical Engineering Congress and Exposition. Volume 11: Nano and Micro Materials, Devices and Systems; Microsystems Integration. Denver, Colorado, USA. November 11–17, 2011. pp. 359-360. ASME. https://doi.org/10.1115/IMECE2011-63736
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