The experimental friction factor and Nusselt number data for laminar flow through a circular duct having wire-coil and helical screw-tape inserts have been presented. Peripherally and axially local temperatures on the duct outside wall have been measured. The temperature drop across the duct wall has been calculated to obtain the duct inside wall temperatures. Peripherally averaged and axially local temperatures have been used to get axially local Nusselt numbers. These axially local Nusselt numbers have been averaged over the whole length of the duct to get the mean Nusselt number. Predictive friction factor and Nusselt number correlations developed by log-regression analysis have also been presented. Nusselt number correlation takes care of the thermal development length represented by the Graetz number, swirl and inertia force due to forced convection at large Reynolds number, buoyancy force due to natural convection at low Reynolds number represented by Rayleigh number and the geometrical parameters of wire-coil and helical screw-tape inserts. The thermohydraulic performance has been evaluated. The helical screw-tape inserts in combination with wire-coil inserts perform better than the individual enhancement technique acting alone for laminar flow through a circular tube up to a certain value of fin parameter.

References

1.
Edwards
,
F. J.
, and
Sheriff
,
N.
,
1961
, “
The Heat Transfer and Friction Characteristics for Forced Convection Air Flow Over a Particular Type of Rough Surface
,”
International Developments in Heat Transfer
,
ASME
,
New York
, pp.
415
425
.
2.
Emerson
,
W. H.
,
1961
, “
Heat Transfer in a Duct in Regions of Separated Flow
,”
Proceedings of the Second International Heat Transfer Conference
,
Colorado
, Vol.
1
, pp.
267
275
.
3.
Uttawar
,
S. B.
, and
Raja Rao
,
M.
,
1985
, “
Augmentation of Laminar Flow Heat Transfer in Tubes by Means of Wire Coil Inserts
,”
ASME J. Heat Transfer
,
106
, pp.
467
469
.
4.
Chen
,
L.
, and
Zhang
,
H. J.
,
1993
, “
Convection Heat Transfer Enhancement of Oil in a Circular Tube With Spiral Spring Inserts
,”
Heat Transfer Measurements and Analysis
,
HTD-ASME Symposium
,
L. C.
Chow
and
A. F.
Emery
, eds., Vol.
249
, pp.
45
50
.
5.
Eiamsa-ard
,
S.
, and
Promvonge
,
P.
,
2007
, “
Heat Transfer Characteristics in a Tube Fitted With Helical Screw-Tape With/Without Core-Rod Inserts
,”
Int. Commun. Heat Mass Transfer
,
34
(
2
), pp.
176
185
.10.1016/j.icheatmasstransfer.2006.10.006
6.
Date
,
A. W.
,
1974
, “
Prediction of Fully-Developed Flow in a Tube Containing a Twisted-Tape
,”
Int. J. Heat Mass Transfer
,
17
, pp.
845
859
.10.1016/0017-9310(74)90152-5
7.
Hong
,
S. W.
, and
Bergles
,
A. E.
,
1976
, “
Augmentation of Laminar Flow Heat Transfer in Tubes by Means of Twisted-Tape Inserts
,”
ASME J. Heat Transfer
,
98
, pp.
251
256
.10.1115/1.3450527
8.
Saha
,
S. K.
, and
Dutta
,
A.
,
2001
, “
Thermohydraulic Study of Laminar Swirl Flow Through a Circular Tube Fitted With Twisted Tapes
,”
ASME J. Heat Transfer
,
123
, pp.
417
427
.10.1115/1.1370500
9.
Patil
,
A. G.
,
2000
, “
Laminar Flow Heat Transfer and Pressure Drop Characteristics of Power-Law Fluids Inside Tubes With Varying Width Twisted Tape Inserts
,”
ASME J. Heat Transfer
,
122
, pp.
143
149
.10.1115/1.521448
10.
Saha
,
S. K.
,
Gaitonde
,
U. N.
, and
Date
,
A. W.
,
1989
, “
Heat Transfer and Pressure Drop Characteristics of Laminar Flow in a Circular Tube Fitted With Regularly Spaced Twisted-Tape Elements
,”
Exp. Therm. Fluid Sci.
,
2
, pp.
310
322
.10.1016/0894-1777(89)90020-4
11.
Date
,
A. W.
, and
Saha
,
S. K.
,
1990
, “
Numerical Prediction of Laminar Flow in a Tube Fitted With Regularly Spaced Twisted-Tape Elements
,”
Int. J. Heat Fluid Flow
,
11
(
4
), pp.
346
354
.10.1016/0142-727X(90)90058-J
12.
Li
,
F.
,
Meindersma
,
W.
,
de Haan
,
A. B.
, and
Reith
,
T.
,
2005
, “
Novel Spacers for Mass Transfer Enhancement in Membrane Separations
,”
J. Membr. Sci.
,
253
(
1-2
), pp.
1
12
.10.1016/j.memsci.2004.12.019
13.
Sivashanmugam
,
P.
, and
Suresh
,
S.
,
2006
, “
Experimental Studies on Heat Transfer and Friction Factor Characteristics of Laminar Flow Through a Circular Tube Fitted With Helical Screw-Tape Inserts
,”
Appl. Therm. Eng.
,
26
(
16
), pp.
1990
1997
.10.1016/j.applthermaleng.2006.01.008
14.
Chang
,
S.
,
Yu
,
K. W.
, and
Lu
,
M.
,
2005
, “
Heat Transfers in Tubes Fitted With Single, Twin, and Triple Twisted Tapes
,”
Exp. Heat Transfer
,
18
(
4
), pp.
279
294
.10.1080/08916150500201560
15.
Dewan
,
A.
,
Mahanta
,
P.
,
Raju
,
K. S.
, and
Kumar
,
P. S.
,
2004
, “
Review of Passive Heat Transfer Augmentation Techniques
,”
Proc. Inst. Mech. Eng.
, Part A,
218
(
7
), pp.
509
527
.10.1243.0957650042456953
16.
Hong
,
M.
,
Deng
,
X.
,
Huang
,
K.
, and
Li
,
Z.
,
2007
, “
Compound Heat Transfer Enhancement of a Convergent-Divergent Tube With Evenly Spaced Twisted Tapes
,”
Chin. J. Chem. Eng.
,
15
(
6
), pp.
814
820
.10.1016/S1004-9541(08)60008-7
17.
Rahimi
,
M.
,
Shabanian
,
S. R.
, and
Alsairafi
,
A. A.
,
2009
, “
Experimental and CFD Studies on Heat Transfer and Friction Factor Characteristics of a Tube, Equipped With Modified Twisted-Tape Inserts
,”
Chem. Eng. Process.: Process Intensification
,
48
(
3
), pp.
762
770
.10.1016/j.cep.2008.09.007
18.
Sarac
,
B. A.
, and
Bali
,
T.
,
2007
, “
An Experimental Study on Heat Transfer and Pressure Drop Characteristics of Decaying Swirl Flow Through a Circular Pipe With a Vortex Generator
,”
Exp. Therm. Fluid Sci.
,
32
(
1
), pp.
158
165
.10.1016/j.expthermflusci.2007.03.002
19.
Jaisankar
,
S.
,
Radhakrishnan
,
T. K.
, and
Sheeba
,
K. N.
,
2009
, “
Experimental Studies on Heat Transfer and Friction Factor Characteristics of Thermosyphon Solar Water Heater System Fitted With Spacer at the Trailing Edge of Twisted Tapes
,”
Appl. Therm. Eng.
,
29
(
5-6
), pp.
1224
1231
.10.1016/j.applthermaleng.2008.06.009
20.
Chang
,
S. W.
,
Su
,
L. M.
,
Yang
,
T. L.
, and
Chiou
,
S. F.
,
2007
, “
Enhanced Heat Transfer of Shaker-Bored Piston Cooling Channel With Twisted-Tape Insert
,”
Heat Transfer Eng.
,
28
(
4
), pp.
321
334
.10.1080/01457630601122740
21.
Cazan
,
R.
, and
Aidun
,
C. K.
,
2009
, “
Experimental Investigation of the Swirling Flow and the Helical Vortices Induced by a Twisted Tape Inside a Circular Pipe
,”
Phys. Fluids
,
21
, p.
037102
.10.1063/1.3085699
22.
Krishna
,
S. R.
,
Pathipaka
,
G.
, and
Sivashanmugam
,
P.
,
2009
, “
Heat Transfer and Pressure Drop Studies in a Circular Tube Fitted With Straight Full Twist
,”
Exp. Therm. Fluid Sci.
,
33
(
3
), pp.
431
438
.10.1016/j.expthermflusci.2008.10.007
23.
Hans
,
V. S.
,
Saini
,
R. P.
, and
Saini
,
J. S.
,
2009
, “
Performance of Artificially Roughened Solar Air Heaters—A Review
,”
Renewable Sustainable Energy Rev.
,
13
(
8
), pp.
1854
1869
.10.1016/j.rser.2009.01.030
24.
Saha
,
S. K.
, and
Mallick
,
D. N.
,
2005
, “
Heat Transfer and Pressure Drop Characteristics of Laminar Flow in Rectangular and Square Plain Ducts and Ducts With Twisted Tapes
,”
ASME J. Heat Transfer
,
127
(
9
), pp.
966
977
.10.1115/1.2010493
25.
Pramanik
,
D.
, and
Saha
,
S. K.
,
2006
, “
Thermohydraulics of Laminar Flow Through Rectangular and Square Ducts With Transverse Ribs and Twisted Tapes
,”
ASME J. Heat Transfer
,
128
(
10
), pp.
1070
1080
.10.1115/1.2345432
26.
Saha
,
S. K.
,
2010
, “
Thermohydraulics of Laminar Flow Through Rectangular and Square Ducts With Axial Corrugation Roughness and Twisted Tapes With Oblique Teeth
,”
ASME J. Heat Transfer
,
132
(
8
), p.
081701
.10.1115/1.4001313
27.
Pal
,
P. K.
, and
Saha
,
S. K.
,
2010
, “
Thermal and Friction Characteristics of Laminar Flow Through Square and Rectangular Ducts With Transverse Ribs and Twisted Tapes With and Without Oblique Teeth
,”
J. Enhanced Heat Transfer
,
17
(
1
), pp.
1
21
.10.1615/JEnhHeatTransf.v17.i1.10
28.
Saha
,
S. K.
,
2010
, “
Thermal and Friction Characteristics of Laminar Flow Through Rectangular and Square Ducts With Transverse Ribs and Wire Coil Inserts
,”
Exp. Therm. Fluid Sci.
,
34
(
1
), pp.
63
72
.10.1016/j.expthermflusci.2009.09.003
29.
Hasim
,
F.
,
Yoshida
,
M.
, and
Miyashita
,
H.
,
2003
, “
Compound Heat Transfer Enhancement by a Combination of a Helically Ribbed Tube With Twisted Tape Inserts
,”
J. Chem. Eng. Jpn.
,
35
(
9
), pp.
1116
1122
.10.1252/jcej.36.1116
30.
Zimparov
,
V. D.
,
Penchev
,
P. J.
, and
Bergles
,
A. E.
,
2006
, “
Performance Characteristics of Some ‘Rough Surfaces’ With Tube Inserts for Single-Phase Flow
,”
J. Enhanced Heat Transfer
,
13
(
2
), pp.
117
137
.10.1615/JEnhHeatTransf.v13.i2.30
31.
Kline
,
S. J.
, and
McClintock
,
F. A.
,
1953
, “
Describing Uncertainties in Single Sample Experiments
,”
Mech. Eng.
,
75
(
1
), pp.
3
8
.
32.
Manglik
,
R. M.
, and
Bergles
,
A. E.
,
1993
, “
Heat Transfer and Pressure Drop Correlations for Twisted-Tape Inserts in Isothermal Tubes: Part I—Laminar Flows
,”
ASME J. Heat Transfer
,
115
(
4
), pp.
881
889
.10.1115/1.2911383
33.
Bergles
,
A. E.
,
Blumenkrantz
,
A. R.
, and
Taborek
,
J.
,
1974
, “
Performance Evaluation Criteria for Enhanced Heat Transfer Surfaces
,”
Proceedings of 5th International Heat Transfer Conference
,
Tokyo
, Vol.
2
, pp.
239
243
, Paper FC 6.3.
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