Viscous Heating for Laminar Liquid Flow in Microtubes

被引:1
|
作者
Liu, Zhigang [1 ]
Liang, Shiqiang [2 ]
Zhang, Chengwu [1 ]
Guan, Ning [1 ]
机构
[1] Shandong Acad Sci, Energy Res Inst, Jinan 250014, Peoples R China
[2] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
基金
中国国家自然科学基金;
关键词
viscous dissipation; microtube; IR camera; numerical simulation; electric double layer effect; BRINKMAN NUMBER; MICROCHANNELS; DISSIPATION; CONDUCTION; CHANNELS;
D O I
10.1007/s11630-011-0469-2
中图分类号
O414.1 [热力学];
学科分类号
摘要
Using de-ionized ultra-filtered water (DIUFW) as the working fluid, the effects of viscous dissipation in microtubes with inner diameters of 19.9 mu m and 44.2 mu m, respectively, have been studied by experiments, the theoretical analysis and the numerical simulation at laminar state. Based on thermal imaging technology of micro-area, the temperature rise resulted from the viscous dissipation in microtube is measured by employing IR camera with a specially magnifying lens at different Reynolds numbers. A 2-D model adapted to microtube is presented to simulate the viscous dissipation characteristic considering electric double layer effect (EDL). The investigation shows the calculating results are in rough agreement with the experimental data if removing the experimental uncertainties. Based on the experimental and the numerical simulation results, a viscous dissipation number which can describe the law of the viscous heating in microtube is summed up and it explains the abnormity of the flow resistance in microtubes.
引用
收藏
页码:268 / 275
页数:8
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