Abstract
Effect of the functional surface wettability on single-phase convective heat transfer in the parallel-plate microchannel flow is investigated experimentally in this paper. The microchannel surface is patterned with a combination of the hydrophilic area and the hydrophobic area in a same area ratio. It is found that the friction constant for the functional surfaces of patterns parallel to the flow is lower than the ones perpendicular to the flow. Also, the heat flux obtained at the surfaces of micrometer size patterns is larger than that of millimeter size patterns.
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