THERMAL SCIENCE

International Scientific Journal

Ahmad Reza Sajadi

,

Seyed Soheil Sadati

,

Masoud Nourimotlagh

,

Omid Pakbaz

,

Dariush Ashtiani

,

Farshad Kowsari

EXPERIMENTAL STUDY ON TURBULENT CONVECTIVE HEAT TRANSFER, PRESSURE DROP, AND THERMAL PERFORMANCE CHARACTERIZATION OF ZNO/WATER NANOFLUID FLOW IN A CIRCULAR TUBE

ABSTRACT
In this experimental study heat transfer and pressure drop behavior of ZnO/water nanofluid flow inside a circular tube with constant wall temperature condition is investigated where the volume fractions of nanoparticles in the base fluid are 1% and 2%. The experiments’ Reynolds numbers ranged roughly from 5000 to 30000. The experimental measurements have been carried out in the fully-developed turbulent regime. The results indicated that heat transfer coefficient increases by 11% and 18% with increasing volume fractions of nanoparticles respectively to 1% and 2% vol. The measurements also showed that the pressure drop of nanofluids were respectively 45% and145% higher than that of the base fluid for volume fractions of 1% and 2% of nanoparticles. However experimental results revealed that overall thermal performance of nanofluid is higher than that of pure water by up to 16% for 2% vol. nanofluid. Also experimental results proved that existing correlations can accurately estimate nanofluids convective heat transfer coefficient and friction factor in turbulent regime, provided that thermal conductivity, heat capacity, and viscosity of the nanofluids are used in calculating the Reynolds, Prandtl, and Nusselt numbers.
KEYWORDS
nanofluid, convective heat transfer, turbulent flow, friction factor, overall thermal performance
PAPER SUBMITTED: 2013-11-14
PAPER REVISED: 2014-02-10
PAPER ACCEPTED: 2014-01-18
PUBLISHED ONLINE: 2014-03-08
DOI REFERENCE: https://doi.org/10.2298/TSCI131114022S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE Issue 4, PAGES [1315 - 1326]
REFERENCES
  1. Ternik, P., Rudolf, R., Conduction and convection heat transfer characteristics of water-based Au nanofluids in a square cavity with differentially side walls subjected to constant temperatures, Therm. Sci., (2013), In Press
  2. Ternik, P., Rudolf, R., Laminar and natural convection of non-Newtonian nanofluids in a squre enclosure with differentially heated side walls, Int. J. Simul. Model, 12 (2013), 1, pp.5-16
  3. Soltanipour, H., Choupani, P., Mirzaee, I., Numerical analysis of heat transfer enhancement with the use of ã-Al2O3/water nanofluid and longitudinal ribs in a curved duct, Therm. Sci., 16 (2012), 2, pp. 469-480
  4. Bejan, A., Kraus, A.D., Heat Transfer Handbook, John Wiley and Sons Inc., New Jersey, 2003, pp. 1029-1130
  5. Webb, R.L., Principles of Enhanced Heat Transfer, John Wiley and Sons Inc., New York, 1994
  6. Webb, R.L., Kim, N.H., Principles of Enhanced Heat transfer, Taylor and Francis, New York, 2005
  7. Bergles, A.E., ExHFT for fourth generation heat transfer technology, Exp. Therm. Fluid Sci., 26 (2002), pp. 317-323
  8. Das, S. K., et. al., Nanofluids Science and Technology, John Wiley and Sons Inc., New Jersey, 2007
  9. Choi, S.U.S., Enhancing thermal conductivity of fluids with nanoparticles, Developments and Applications of Non-Newtonian Flows, FED-vol. 231/MD-vol. 66, ASME(1995), pp. 99-105
  10. Lee, J.H., et. al., Effective viscosities on thermal conductivities of aqueous nanofluid containing low volume concentrations of AL2O3 nanoparticles, Int. J. Heat Mass Transfer., 51 (2008), pp. 2651-2656
  11. Fotukian, S.M., Nasr Esfahany, M., Experimental study of turbulent convective heat transfer and pressure drop of dilute Cu/water nanofluid inside a circular tube, Int. Commun. Heat Mass, 37 (2010), pp. 214-219
  12. Sundar, L.S., Sharma,K.V., Turbulent heat transfer and friction factor of AL2O3nanofluid in circular tube with twisted tape inserts, Int. J. Heat Mass Transfer, 53 (2010), pp. 1409-1416
  13. Suresh, S., et. al., Experimental studies on heat transfer and friction factor characteristics of CuO/water nanofluid under turbulent helically dimpled tube, Exp. Therm. Fluid Sci., 35 (2011), pp. 542-549
  14. Ternik, P., et. al., Numerical study of heat transfer enhancement of homogeneous water-Au nanofluid under natural convection, Mate. Technol., 46 (2012), 3, pp. 257-261
  15. Ternik, P., Rudolf, R., Heat transfer enhancement for natural convection flow of water-based nanofluids in a square enclosure, Int. J. Simul. Model, 11 (2012), 1, pp. 29-39
  16. Sourtiji, E., Hosseinizadeh, S.F., Heat transfer augmentation of magnetohydrodynamics natural convection in L-shaped cavities utilizing nanofluids, Therm. Sci., 16 (2012), 2, pp. 29-39
  17. Sajadi, A.R., Kazemi, M.H., Investigation of turbulent convective heat transfer and pressure drop of TiO2/water nanofluid in circular tube, Int. Commun. Heat Mass, 38 (2011), pp. 1474-1478
  18. Ashtiani, D., et. al., An experimental investigation on heat transfer characteristics of multi-walled CNT-heat transfer oil nanofluid flow inside flattened tubes under uniform wall temperature condition, Int. Commun. Heat Mass, 39 (2012), pp. 1404-1409
  19. Fotukian, S.M., NasrEsfahany, M., Experimental investigation of turbulent convective heat transfer of dilute-Al2O3/water nanofluid inside a circular tube, Int. J. Heat Fluid Fl., 31 (2010), pp. 606-612
  20. Heyhat, M.M., et. al., Experimental investigation of laminar convective heat transfer and pressure drop of water-based Al2O3 nanofluids in fully developed flow regime, Exp. Therm. Fluid Sci., 44 (2013), pp. 483-489
  21. Heyhat, M.M., et. al., Experimental investigation of turbulent flow and convective heat transfer characteristics of alumina water nanofluids in fully developed flow regime, Int. Commun. Heat Mass, 39 (2012), pp. 1272-1278
  22. M. HaghshenasFard, et. al., Numerical and experimental investigation of heat transfer of ZnO/Water nanofluid in the concentric tube and plate heat exchangers, Therm. Sci, 15 (2011), 1, pp.185-196.
  23. Gyoung-Ja Lee et al., Thermal conductivity enhancement of ZnO nanofluid using a one-step physical method, Thermochim. Acta, 542 (20), 2012, pp. 24-27.
  24. Pak, B.C., Cho, Y.I., Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles, J. Exp. Heat Transfer, 11 (1998), pp. 151-170
  25. Williams, W., Buongiorno, J., Experimental Investigation of Turbulent Convective Heat Transfer and Pressure Loss of Alumina/Water and Zirconia/Water Nanoparticle Colloids (Nanofluids) in Horizontal Tubes, Transactions (ASME), Journal of Heat Transfer, 2008, Vol. 130, 042412
  26. Duangthongsuk, W., Wongwises, S., An experimental study on the heat transfer performance and pressure drop of TiO2-water nanofluids flowing under a turbulent flow regime, Int. J. Heat Mass Transfer, 53 (2010), pp. 334-344
  27. Prasher, R., et. al., Effect of aggregation on thermal conduction in colloidal nanofluids, Appl. Phys. Lett., 89 (2006), 14, 143119, DOI NO. 10.1063/1.2360229
  28. Eapen, J., et. al., The classical nature of thermal conduction in nanofluids, J. Heat. Transf., Trans ASME, 2010, 132(10), 102402, DOI NO. 10.1115/1.4001304
  29. Timofeeva, E.V., et. al., Particle shape effects on thermophysical properties of alumina nanofluids. J. Appl. Phys, 106 (2009), 014304, DOI NO. 10.1063/1.3155999
  30. Pak, B.C., Cho, Y.I., Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles, J. Exp. Heat Transfer, 11 (1998), pp. 151-170
  31. Dittus, F.W., Buelter, L.M.K., Heat transfer in automobile radiators of the tubular type, University of California Publications in Engineering, 2 (1930), pp. 443-461
  32. Petukhov, B.S., Popov, V.M., Theoretical calculation of heat exchange and frictional resistance in turbulent flow in tubes of an incompressible fluid with variable physical properties, J. High Temp., 1 (1963), pp. 69-83
  33. S.J. Kline, F.A. Mcclintock, Describing uncertainties in single-sample experiments, J. Mech. Eng., 75 (1953), pp. 3-8
PDF VERSION [DOWNLOAD]
Experimental study on turbulent convective heat transfer, pressure drop, and thermal performance characterization of ZnO/water nanofluid flow in a circular tube

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence