Abstract:
Techniques for heat transfer are provided. In one aspect of the invention, a heat-transfer device (200) is provided. The heat-transfer device comprises one or more microchannels (213) suitable for containing a heat-transfer fluid, one or more of the microchannels having protruding structures (214) on at least one inner surface thereof configured to affect flow of the heat-transfer fluid through the one or more microchannels. The structures may comprise posts coated with a hydrophobic coating.
Abstract:
Techniques for heat transfer are provided. In one aspect of the invention, a heat-transfer device (200) is provided. The heat-transfer device comprises one or more microchannels (213) suitable for containing a heat-transfer fluid, one or more of the microchannels having protruding structures (214) on at least one inner surface thereof configured to affect flow of the heat-transfer fluid through the one or more microchannels. The structures may comprise posts coated with a hydrophobic coating.
Abstract:
An apparatus, comprising a plurality of closed cells disposed on a surface of a substrate. Each of the closed cells has at least one dimension that is less than about 1 millimeter and are configured to hold a medium therein. The apparatus also comprises a foam that contacts the closed cells. The foam has fluid walls that include a surfactant, and bubbles of the foam layer are filled with the medium.