Droplet-surface interaction, Leidenfrost point (LFP), Leidenfrost effect, Superwetting nanostructures
Two-phase cooling devices
Limited heat flux of conventional two-phase cooling solutions due to the Leidenfrost effect
The invention provides new superwetting nanostructures that can fundamentally alter droplet-surface interactions to continuously rewet the surface and prevent vapor film formation. Micro-scale square posts can be fabricated on silicon wafers with a regular micro-electromechanical system process, photolithography followed by reactive ion etch. For different micro-nano hierarchical structures, silica particles with different diameters, from 15nm to 75nm, were spin-coated on the substrates already having micro scale square posts, and sintered. Such square-pillared design of surface textures can significantly enhance nucleate boiling and diminish the Leidenfrost limits.
US Patent Application Number 12/872353, filed on August 31, 2010
PCT Patent Application Number PCT/US2011/043696, filed on July 12, 2011
Last revised: April 29, 2013
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