A rod was positioned upstream of a circular cylinder to enhance its heat transfer in an air stream. The diameter of the cylinder was 40mm and the diameter of the rod ranged from 1to12mm⁠. The distance between the axes of the cylinder and the rod was varied between 40 and 120mm and the Reynolds number ranged from 1.5×104 to 6.2×104⁠. In the optimum configuration, the heat transfer on the front face of the cylinder increases remarkably relative to a single circular cylinder, and results in a 40% overall increase in heat transfer.

Issue Section:
Forced Convection
Keywords:
rods (structures), heat transfer, confined flow, turbulence, flow control, forced convection heat transfer, heat transfer enhancement, flow control, circular cylinder
Topics:
Circular cylinders, Cylinders, Flow (Dynamics), Heat transfer, Reynolds number
1.
Lesage
,
F.
, and
Gartshore
,
L. S.
, 1987, “
A Method of Reducing Drag and Fluctuating Side Force on Bluff Bodies
,”
J. Wind. Eng. Ind. Aerodyn.
0167-6105,
25
, pp.
229
–
245
.
Crossref
Search ADS
 
2.
Tsutsui
,
T.
, and
Igarashi
,
T.
, 2002, “
Drag Reduction of a Circular Cylinder in an Air-Stream
,”
J. Wind. Eng. Ind. Aerodyn.
0167-6105,
90
, pp.
527
–
541
.
Crossref
Search ADS
 
3.
Igarashi
,
T.
, 1997, “
Drag Reduction of a Square Prism by Flow Control Using a Small Rod
,”
J. Wind. Eng. Ind. Aerodyn.
0167-6105,
69–71
, pp.
141
–
153
.
4.
Zhang
,
P. F.
,
Wang
,
J. J.
,
Lu
,
S. F.
, and
Mi
,
J.
, 2005, “
Aerodynamic Characteristics of a Square Cylinder With a Rod in a Staggered Arrangement
,”
Exp. Fluids
0723-4864,
35-4
, pp.
494
–
502
.
5.
Sarioglu
,
M.
,
Akansu
,
Y. E.
, and
Yavuz
,
T.
, 2005, “
Control of Around Square Cylinders at Incidence by Using a Rod
,”
AIAA J.
0001-1452,
43–7
, pp.
1419
–
1426
.
6.
Prasad
,
A.
, and
Williamson
,
C. H. K.
, 1997, “
A Method for the Reduction of Bluff Body Drag
,”
J. Wind. Eng. Ind. Aerodyn.
0167-6105,
69–71
, pp.
155
–
167
.
7.
Eckert
,
E. G. G.
, and
Drake
, Jr.,
R. M.
,
Heat and Mass Transfer
, 2nd ed.,
McGraw-Hill
,
New York
, p.
242
.
8.
Tsutsui
,
T.
,
Igarashi
,
T.
, and
Nakamura
,
H.
, 2001, “
Drag Reduction and Heat Transfer Enhancement of a Square Prism
,”
JSME Int. J., Ser. B
1340-8054,
44–4
, pp.
575
–
583
.
9.
Igarashi
,
T.
, and
Tsutsui
,
T.
, 1998, “
Enhancement of Heat Transfer and Reduction of Drag of a Square Prism Arranged Diamond-Shape in an Air Stream
,” in
Proceedings of the 11th IHTC
,
Kyongju
, Korea, Vol.
5
, pp.
261
–
266
.
10.
Perkins
, Jr.,
H. C.
, and
Leppert
,
G.
, 1964, “
Local Heat-Transfer Coefficients on a Uniformly Heated Cylinder
,”
Int. J. Heat Mass Transfer
0017-9310,
7
, pp.
143
–
158
.
Crossref
Search ADS
 
11.
Chang
,
B. H.
, and
Mills
,
A. F.
, 2004, “
Effect of Aspect Ratio on Forced Convection Heat Transfer From Cylinders
,”
Int. J. Heat Mass Transfer
0017-9310,
47
, pp.
1289
–
1296
.
Crossref
Search ADS
 
12.
Igarashi
,
T.
, and
Hirata
,
M.
, 1977, “
Heat Transfer in Separated Flows, Part 2: Theoretical Analysis
,”
Heat Transfer-Jpn. Res.
0096-0802,
6
(
3
), pp.
60
–
78
.
13.
Zukauskas
,
A.
, 1972, “
Heat Transfer From Tube in Crossflow
,”
Advances in Heat Transfer
,
Academic
,
New York
, Vol.
8
, pp.
93
–
160
.
14.
Kline
,
S. J.
, 1985, “
The Purposes of Uncertainty Analysis
,”
ASME J. Fluids Eng.
0098-2202,
107
, pp.
153
–
160
.
Crossref
Search ADS
 
15.
Achenbach
,
E.
, 1968, “
Distribution of Local Pressure and Skin Friction Around a Circular Cylinder in Cross-Flow up to Re=5×106
,”
J. Fluid Mech.
0022-1120,
34
, part 4, pp.
625
–
639
.
Crossref
Search ADS
 
16.
Bearman
,
P. W.
, 1969, “
On Vortex Shedding From a Circular Cylinder in the Critical Reynolds Number Regime
,”
J. Fluid Mech.
0022-1120,
37
, part 3, pp.
577
–
585
.
Crossref
Search ADS
 
17.
Schlichting
,
H.
, 1968,
Boundary Layer Theory
, 6th ed.,
McGraw-Hill
,
New York
, p.
17
.
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 by American Society of Mechanical Engineers
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