Usual heat transfer fluids with suspended ultra fine particles of nanometer size are named as nanofluids, which have opened a new dimension in heat transfer processes. The recent investigations confirm the potential of nanofluids in enhancing heat transfer required for present age technology. The present investigation goes detailed into investigating the increase of thermal conductivity with temperature for nano fluids with water as base fluid and particles of Al2O3 or CuO as suspension material. A temperature oscillation technique is utilized for the measurement of thermal diffusivity and thermal conductivity is calculated from it. The results indicate an increase of enhancement characteristics with temperature, which makes the nanofluids even more attractive for applications with high energy density than usual room temperature measurements reported earlier.

Issue Section:
Conduction Heat Transfer
Keywords:
alumina, copper compounds, nanostructured materials, suspensions, thermal conductivity, heat transfer, thermal diffusivity, Conduction, Heat Transfer, Suspensions, Thermal, Thermophysical
Topics:
Fluids, Heat transfer, Nanofluids, Particulate matter, Temperature, Thermal conductivity, Water, Thermal diffusivity, Oscillations, Temperature effects
1.
Ahuja
,
A. S.
,
1975
, “
Augmentation of Heat Transport in Laminar Flow of Polystyrene Suspension: Experiments and Results
,”
J. Appl. Phys.
,
46
(
8
), pp.
3408
–
3416
.
2.
Liu, K. V., Choi, U. S., and Kasza, K. E., 1988, “Measurement of Pressure Drop and Heat Transfer in Turbulent Pipe Flows of Particulate Slurries,” Argonne National Laboratory Report, ANL-88-15.
3.
Choi, U. S., 1995, “Enhancing Thermal Conductivity of Fluids With Nanoparticles,” Developments and Applications of Non-Newtonian Flows, D. A. Siginer and H. P. Wang, eds., FED-vol. 231/MD-Vol. 66, ASME, New York, pp. 99–105.
4.
Lee
,
S.
,
Choi
,
U. S.
,
Li
,
S.
, and
Eastman
,
J. A.
,
1999
, “
Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles
,”
ASME J. Heat Transfer
,
121
, pp.
280
–
289
.
5.
Xuan
,
Y.
, and
Li
,
Q.
,
2000
, “
Heat Transfer Enhancement of Nanofluids
,”
Int. J. Heat Fluid Flow
,
21
, pp.
58
–
64
.
6.
Sohn
,
C. W.
, and
Chen
,
M. M.
,
1981
, “
Microconvective Thermal Conductivity in Disperse Two Phase Mixture as Observed in a Low Velocity Couette Flow Experiment
,”
ASME J. Heat Transfer
,
103
, pp.
47
–
51
.
7.
Maxwell, J. C., 1881, A Treatise on Electricity and Magnetism, 2nd Ed., 1, Clarendon Press, Oxford, U.K., p. 435.
8.
Hamilton
,
R. L.
, and
Crosser
,
O. K.
,
1962
, “
Thermal Conductivity of Heterogeneous Two Component Systems
,”
I & EC Fundamentals
,
1
(
3
), pp.
187
–
191
.
9.
Wasp, F. J., 1977, “Solid-Liquid Slurry Pipeline Transportation,” Trans. Tech., Berlin.
10.
Eastman
,
J. A.
,
Choi
,
U. S.
,
Li
,
S.
,
Yu
,
W.
, and
Thompson
,
L. J.
,
2001
, “
Anomalously Increased Effective Thermal Conductivities of Ethylene Glycol-Based Nanofluids Containing Copper Nanoparticles
,”
Appl. Phys. Lett.
,
78
(
6
), pp.
718
–
720
.
11.
Roetzel, W., Prinzen, S., and Xuan, Y., 1990, “Measurement of Thermal Diffusivity Using Temperature Oscillations,” Thermal Conductivity 21, C. Y, Cremers and H. A. Fine, eds., Plenum Press, New York and London, pp. 201–207.
12.
Czarnetzki
,
W.
, and
Roetzel
,
W.
,
1995
, “
Temperature Oscillation Techniques for Simultaneous Measurement of Thermal Diffusivity and Conductivity
,”
Int. J. Thermophys.
,
16
(
2
), pp.
413
–
422
.
13.
VDI-Wa¨rmeatlas, 1997, 8th Ed. VDI Verlag GmbH, Du¨sseldorf.
14.
Bolz, R., and Tuve, G., 1970, Handbook of Tables for Applied Engineering Science, The Chemical Rubber Co.
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