Viscous Heating for Laminar Liquid Flow in Microtubes  

作　　者：Zhigang LIU Shiqiang LIANG Chengwu ZHANG Ning GUAN 

机构地区：[1]Energy Research Institute of Shandong Academy of Sciences, Jinan 250014, China [2]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Journal of Thermal Science》2011年第3期268-275,共8页热科学学报（英文版）

基　　金：supports of the National Natural Science Foundation of China (Grant No. 50976118);the Shandong Provincial Natural Science Foundation of China (Grant No. ZR2010EM056) are gratefully acknowledged

摘　　要：Using de-ionized ultra-filtered water (DIUFW) as the working fluid, the effects of viscous dissipation in micro-tubes with inner diameters of 19.9μm and 44.2μm, 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.

关 键 词：viscous dissipation MICROTUBE IR camera numerical simulation electric double layer effect 

分 类 号：TQ051.5[化学工程] TK124[动力工程及工程热物理—工程热物理]