Effect of viscous dissipation on the optimization of the heat transfer in internally finned tubes

被引:26
作者
Fabbri, G [1 ]
机构
[1] Univ Bologna, Dipartimento Ingn Energet Nucl & Controllo Ambien, I-40136 Bologna, Italy
关键词
D O I
10.1016/j.ijheatmasstransfer.2004.03.007
中图分类号
O414.1 [热力学];
学科分类号
摘要
In the present work the effect of viscous dissipation on the heat transfer in a finned tube cooled by a fluid in laminar flow is studied under the condition of imposed heat flux. In particular, the alterations induced by viscous dissipation in the optimum finned tube geometries are investigated. To this aim, the velocity and temperature distributions on the finned tube cross-section are determined with the help of a finite element model which takes the effect of viscous dissipation into account. Moreover, a global heat transfer coefficient is calculated. After having assigned a polynomial lateral profile to the fins of the tube, the geometry is then optimized in order to maximize the heat transferred per unit of tube length for a given weight and for a given hydraulic resistance in correspondence with different intensities of viscous dissipation. Lastly, the differences between the optimum geometries obtained under different conditions of viscous dissipation are analyzed. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3003 / 3015
页数:13
相关论文
共 18 条
[1]  
[Anonymous], 1987, HDB SINGLEPHASE CONV
[2]   Forced convection in the thermal entrance region of a circular duct with slug flow and viscous dissipation [J].
Barletta, A ;
Zanchini, E .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1997, 40 (05) :1181-1190
[3]   On forced convection in a circular duct with slug flow and viscous dissipation [J].
Barletta, A .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 1996, 23 (01) :69-78
[4]   LAMINAR HEAT-TRANSFER IN A TUBE WITH VISCOUS DISSIPATION [J].
BASU, T ;
ROY, DN .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1985, 28 (03) :699-701
[5]   HEAT EFFECTS IN CAPILLARY FLOW-I [J].
BRINKMAN, HC .
APPLIED SCIENTIFIC RESEARCH SECTION A-MECHANICS HEAT CHEMICAL ENGINEERING MATHEMATICAL METHODS, 1950, 2 (02) :120-124
[6]   Optimum profiles for asymmetrical longitudinal fills in cylindrical ducts [J].
Fabbri, G .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1999, 42 (03) :511-523
[7]   Heat transfer optimization in corrugated wall channels [J].
Fabbri, G .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2000, 43 (23) :4299-4310
[8]   A genetic algorithm for fin profile optimization [J].
Fabbri, G .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1997, 40 (09) :2165-2172
[9]   Heat transfer optimization in internally finned tubes under laminar flow conditions [J].
Fabbri, G .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1998, 41 (10) :1243-1253
[10]   THE EFFECTS OF VISCOUS DISSIPATION ON HEAT-TRANSFER TO POWER LAW FLUIDS IN ARBITRARY CROSS-SECTIONAL DUCTS [J].
LAWAL, A ;
MUJUMDAR, AS .
WARME UND STOFFUBERTRAGUNG-THERMO AND FLUID DYNAMICS, 1992, 27 (07) :437-446