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Convective heat transfer to shear-driven liquid film flow in a microchannel

机译:对流传热到微通道中剪切驱动的液膜流

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摘要

Experimental study on heat transfer to a liquid water film in a microchannel was performed. The liquid film was introduced into a nitrogen stream through a 350μm circular hole upstream of a 1 mm × 1 mm heater in a 220 μm deep and 1.5 mm wide rectangular microchannel. Average heat transfer coefficient was obtained for different gas and liquid flow rates and results were compared to single-phase flow. Significant improvement in heat transfer performance was observed with no appreciable change in pressure drop. Experimental data combined with a heat transfer analysis was used to infer the mechanisms controlling the heat transfer process.
机译:进行了热传递到微通道中液态水膜的实验研究。将液膜通过220微米深和1.5毫米宽的矩形微通道中1毫米×1毫米加热器上游的350微米圆孔引入氮气流中。获得了不同气体和液体流速下的平均传热系数,并将结果与​​单相流进行了比较。观察到传热性能的显着改善,而压降没有明显变化。实验数据与传热分析相结合,用于推断控制传热过程的机理。

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