| 粗糙表面形貌对微尺度流动换热的影响 |
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| 引用本文： | 张程宾,陈永平,施明恒,付盼盼.粗糙表面形貌对微尺度流动换热的影响[J].工程热物理学报,2011(2):326-328. |
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| 作者姓名： | 张程宾 陈永平 施明恒 付盼盼 |
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| 作者单位： | 东南大学能源与环境学院; |
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| 基金项目： | 国家自然科学基金(No.51076028); 东南大学优秀博士学位论文基金(No.YBJJ0918) |
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| 摘 要： | 基于分形几何定量描述了多尺度自仿射的粗糙表面形貌,建立了微通道内层流流动换热的理论模型并对表面形貌的影响进行了数值模拟.研究表明,自仿射分形维数直接反映了表面轮廓的不规则度,对于两个具有相同统计粗糙度的轮廓,可能存在不同的分形维数;与常规尺度通道不同,雷诺数、粗糙高度和粗糙表面分形维数都对微通道内层流流动换热有着重要影...
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| 关 键 词： | 分形 粗糙度 层流 微通道 |
EFFECTS OF ROUGH SURFACE TOPOGRAPHY ON MICROSCALE CONVECTIVE HEAT TRANSFER |
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| ZHANG Cheng-Bin CHEN Yong-Ping SHI Ming-Heng FU Pan-Pan.EFFECTS OF ROUGH SURFACE TOPOGRAPHY ON MICROSCALE CONVECTIVE HEAT TRANSFER[J].Journal of Engineering Thermophysics,2011(2):326-328. |
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| Authors: | ZHANG Cheng-Bin CHEN Yong-Ping SHI Ming-Heng FU Pan-Pan |
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| Institution: | ZHANG Cheng-Bin CHEN Yong-Ping SHI Ming-Heng FU Pan-Pan (School of Energy and Environment,Southeast University,Nanjing 210096,China) |
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| Abstract: | The multi-scale self-affine topography of rough surfaces is characterized by using fractal geometry.Based on such characterization,a model of laminar heat transfer in rough microchannels is proposed to investigate the effects of rough surface topography on laminar convective heat transfer. The results indicate that,the self-affine fractal dimension can directly exhibit the frequency variation of the surface profile,and the fractal dimension may be different for two profiles with the same average roughness h... |
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| Keywords: | fractal roughness laminar flow microchannel |
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