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响.
参考文献
| [1] | Kandlikar, SG .Exploring roughness effect on laminar internal flow-are we ready for change?[J].Nanoscale and microscale thermophysical engineering,2008(1):61-82. |
| [2] | Giulio Croce;Paola D'Agaro .Numerical analysis of roughness effect on microtube heat transfer[J].Superlattices and microstructures,2004(3/6):601-616. |
| [3] | C. Kleinstreuer;J. Koo .Computational Analysis of Wall Roughness Effects for Liquid Flow in Micro-Conduits[J].Journal of Fluids Engineering: Transactions of the ASME,2004(1):1-9. |
| [4] | M. Bahrami;M. M. Yovanovich;J. R. Culham .Pressure Drop of Fully Developed, Laminar Flow in Rough Microtubes[J].Journal of Fluids Engineering: Transactions of the ASME,2006(3):632-637. |
| [5] | S.G.KANDLIKAR .Roughness effects at microscale - reassessing Nikuradse's experiments on liquid flow in rough tubes[J].Bulletin of the Polish Academy of Sciences. Technical Sciences,2005(4):343-349. |
| [6] | James B. Taylor;Andres L. Carrano;Satish G. Kandlikar .Characterization of the effect of surface roughness and texture on fluid flow-past, present, and future[J].International Journal of Thermal Sciences,2006(10):962-968. |
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