CONVECTIVE HEAT TRANSFER CORRELATIONS IN SOME COMMON MICRO-GEOMETRIES

被引:26
作者
Aydin, Orhan [1 ]
Avci, Mete [1 ]
机构
[1] Karadeniz Tech Univ, Dept Mech Engn, TR-61080 Trabzon, Turkey
来源
MICROFLUIDICS BASED MICROSYSTEMS: FUNDAMENTALS AND APPLICATIONS | 2010年
关键词
FLUID-FLOW; MICROCHANNELS;
D O I
10.1007/978-90-481-9029-4_1
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
This work summarizes some of our recent theoretical studies on convective heat transfer in micro-geometries. Only pure analytical solutions are presented here. At first, forced convection is studied for the following three geometries: microtube, microchannel between two parallel plates and microannulus between two concentric cylinders. Constant heat flux is assumed to be applied at walls. Then mixed convection in a vertical parallel-plate microchannel with symmetric wall heat fluxes is investigated. Steady and laminar internal flow of a Newtonian is analyzed. In the analysis, the usual continuum approach is coupled with the two main characteristics of the microscale phenomena, the velocity slip and the temperature jump. In the forced convection problems, viscous dissipation is also included, while it is neglected for the mixed convection problem. Internal velocity and temperature distributions are obtained for varying values of governing parameters. Finally, fully analytical Nusselt number correlations are developed for the cases investigated.
引用
收藏
页码:1 / 14
页数:14
相关论文
共 15 条
[1]   Laminar forced convection slip-flow in a micro-annulus between two concentric cylinders [J].
Avci, Mete ;
Aydin, Orhan .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2008, 51 (13-14) :3460-3467
[2]   Mixed convection in a vertical parallel plate microchannel with asymmetric wall heat fluxes [J].
Avci, Mete ;
Aydin, Orhan .
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2007, 129 (08) :1091-1095
[3]   Heat and fluid flow characteristics of gases in micropipes [J].
Aydin, O ;
Avci, M .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2006, 49 (9-10) :1723-1730
[4]   Analysis of laminar heat transfer in micro-Poiseuille flow [J].
Aydin, Orhan ;
Avci, Mete .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2007, 46 (01) :30-37
[5]   SIMULATION OF HEAT AND MOMENTUM-TRANSFER IN COMPLEX MICROGEOMETRIES [J].
BESKOK, A ;
KARNIADAKIS, GE .
JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER, 1994, 8 (04) :647-655
[6]  
GadelHak M., 2001, MECH IND, V2, P313, DOI DOI 10.1016/S004410050767
[7]   Size effect on microscale single-phase flow and heat transfer [J].
Guo, ZY ;
Li, ZX .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2003, 46 (01) :149-159
[8]   Size effect on single-phase channel flow and heat transfer at microscale [J].
Guo, ZY ;
Li, ZX .
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2003, 24 (03) :284-298
[9]   Micro-electro-mechanical-systems (MEMS) and fluid flows [J].
Ho, CM ;
Tai, YC .
ANNUAL REVIEW OF FLUID MECHANICS, 1998, 30 :579-612
[10]   Single-phase convective heat transfer in microchannels: a review of experimental results [J].
Morini, GL .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2004, 43 (07) :631-651