Investigation of heat transfer around microwire in air environment using 3 omega method
文献类型：期刊论文
| 作者 | Wang, Z. L.1; Tang, D. W.2 |
| 刊名 | INTERNATIONAL JOURNAL OF THERMAL SCIENCES
 |
| 出版日期 | 2013-02-01 |
| 卷号 | 64页码:145-151 |
| 关键词 | 3 omega method Natural convection Heat conduction Driving force Microwire |
| 英文摘要 | The 3 omega principle is presented for the measurement of the heat transfer coefficient (h) based on natural convection model and heat conduction model. The 3 omega technique is used at room temperature to measure h over the surfaces of microwires of the diameters 10-100 mu m at horizontal and vertical orientations. The fitted results show that the heat loss from the microscale platinum wire to the air is dominated by heat conduction and the natural convection contribution is negligible. The comparison of the measured third harmonics for horizontal and vertical wires justifies that the orientation effect is negligible at microscales. The measured value of h is nearly two orders larger than that at macro scale and of the similar order to those from other literatures. Based on the 3 omega principle, an explicit expression with a heat conduction shape factor is introduced and can predict the heat transfer coefficient reasonably in the validated range of frequency. Both the experimental results and the theoretical analysis conclude that the scale effect of heat transfer may be contributed to two factors: the effect of buoyancy, the driving force at microscales may be negligible; the heat loss is enhanced mainly by high ratio of surface to volume at microscales. It also shows the validation of the 3 omega principle for thin wire if the heat loss to surrounding gas is dominated by heat conduction at microscale. (C) 2012 Elsevier Masson SAS. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Thermodynamics ; Engineering, Mechanical |
| 研究领域[WOS] | Thermodynamics ; Engineering |
| 关键词[WOS] | THERMAL-CONDUCTIVITY MEASUREMENT ; DIFFUSIVITY ; TRANSPORT ; GAS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313466800014 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.etp.ac.cn/handle/311046/98883]  |
| 专题 | 工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI） |
| 作者单位 | 1.China Univ Petr, Thermal Engn & Power Dept, Qingdao 266555, Peoples R China 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Z. L.,Tang, D. W.. Investigation of heat transfer around microwire in air environment using 3 omega method[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES,2013,64:145-151. |
| APA | Wang, Z. L.,&Tang, D. W..(2013).Investigation of heat transfer around microwire in air environment using 3 omega method.INTERNATIONAL JOURNAL OF THERMAL SCIENCES,64,145-151. |
| MLA | Wang, Z. L.,et al."Investigation of heat transfer around microwire in air environment using 3 omega method".INTERNATIONAL JOURNAL OF THERMAL SCIENCES 64(2013):145-151. |
入库方式： OAI收割
来源：工程热物理研究所
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