Enhancement of laminar natural convective heat transfer in concentric annuli with radial fins using nanofluids

被引：32

作者：

Arbaban, M. ^{[1
]}

Salimpour, M. R. ^{[2
]}

机构：

[1] Islamic Azad Univ, Najafabad Branch, Dept Mech Engn, Najafabad, Iran

[2] Isfahan Univ Technol, Dept Mech Engn, Esfahan 8415683111, Iran

来源：

HEAT AND MASS TRANSFER | 2015年 / 51卷 / 03期

关键词：

PREDICTION;

D O I：

10.1007/s00231-014-1380-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the present study, laminar natural convection of nanofluids confined between two horizontal concentric cylinders with eight radial fins attached to the inner cylinder is studied. Governing equations are solved using the finite volume method. The computations are performed for various Rayleigh numbers, nanofluids and volume fractions of nanoparticles. From the results, it is found that the average Nusselt number enhances when volume fraction and thermal conductivity of nanoparticles increases. Also, it is observed that the average Nusselt number of Cu-water nanofluid is highest among the nanofluids of the present study. Moreover, it is seen that the temperature gradient and absolute value of stream function decrease by addition of nanoparticles.

引用

页码：353 / 362

页数：10

共 18 条

[1] Natural convection heat transfer enhancement in horizontal concentric annuli using nanofluids [J].

Abu-Nada, E. ;

Masoud, Z. ;

Hijazi, A. .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2008, 35 (05) :657-665

[2] Effects of variable viscosity and thermal conductivity of Al2O3-water nanofluid on heat transfer enhancement in natural convection [J].

Abu-Nada, Eiyad .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2009, 30 (04) :679-690

[3]

[Anonymous], 1995, ASME FED

[4] Prediction of turbulent forced convection of a nanofluid in a tube with uniform heat flux using a two phase approach [J].

Behzadmehr, A. ;

Saffar-Avval, M. ;

Galanis, N. .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2007, 28 (02) :211-219

[5] Numerical investigation of nanofluids forced convection in circular tubes [J].

Bianco, V. ;

Chiacchio, F. ;

Manca, O. ;

Nardini, S. .

APPLIED THERMAL ENGINEERING, 2009, 29 (17-18) :3632-3642

[6] LAMINAR NATURAL-CONVECTION IN INTERNALLY FINNED HORIZONTAL ANNULI [J].

CHAI, JC ;

PATANKAR, SV .

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, 1993, 24 (01) :67-87

[7]

Incropera F.P., 2005, Introduction to heat transfer, V5th

[8] PREDICTION OF TURBULENT THERMAL-CONVECTION IN CONCENTRIC AND ECCENTRIC HORIZONTAL ANNULI [J].

KENJERES, S ;

HANJALIC, K .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 1995, 16 (05) :429-439

[9] EXPERIMENTAL AND THEORETICAL-STUDY OF NATURAL-CONVECTION IN ANNULUS BETWEEN HORIZONTAL CONCENTRIC CYLINDERS [J].

KUEHN, TH ;

GOLDSTEIN, RJ .

JOURNAL OF FLUID MECHANICS, 1976, 74 (APR22) :695-&

[10] STUDY OF NATURAL-CONVECTION IN HORIZONTAL ANNULI [J].

KUMAR, R .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1988, 31 (06) :1137-1148

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