An Experimental Study on Heat Transfer and Friction Factor of Al2O3 Nanofluid

L.  Syam Sundar; K.V.  Sharma

doi:10.15282/jmes.1.2011.9.0009

Authors

L. Syam Sundar Centre for Energy Studies, JNTUH College of Engineering, Kukatpally, Hyderabad 500085, India
K.V. Sharma Faculty of Mechanical Engineering Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia

DOI:

https://doi.org/10.15282/jmes.1.2011.9.0009%20%20

Keywords:

forced convection in a tube, aluminum oxide nanofluid, twisted tape inserts, heat transfer enhancement, nanofluid friction factor.

Abstract

This paper reports experimental investigations of fully developed laminar convective heat transfer and friction factor characteristics of different volume concentrations of Al2O3 nanofluid in a plain tube, fitted with different twist ratios of twisted tape inserts. Experiments are conducted with water and nanofluid in the range of 700  Re  2200, particle volume concentration of 0   0.5 %, and twisted tape twist ratios of 0  H / D 15. The heat transfer coefficient of the nanofluid is high compared with water, and further enhancement of heat transfer is observed with the twisted tape inserts. Pressure drop is slightly increased with the inserts, but is comparatively negligible. A generalized regression equation is developed based on the experimental data for the estimation of the Nusselt number and friction factor for water and nanofluid in a plain tube with twisted tape inserts.

References

Choi, S. U. S. (1995). Enhancing thermal conductivity of fluid with nanoparticles. In: Siginer, D.A., Wang, H.P. (Eds.), Developments and Applications of Non- Newtonian Flows, FED-V.231/ MD-V.66. ASME, New York, 99–105.

Das, S. K, Putra, N., Thiesen, P., & Roetzel, W. (2003). Temperature dependence of thermal conductivity enhancement for nanofluids. Journal of Heat Transfer, 125, 567–574.

Eastman, J. A., Choi, S. U. S., Li, S., Soyez, G., Thompson, L. J., & DiMelfi, R. J. (1999). Novel thermal properties of nanostructured materials. Journal of Metastable Nanocrystal Materials, 2(6), 629–634.

Eastman, J. A., Choi, S. U. S., Li, S., Yu, W., & Thompson, L. J. (2001). Anomalously increase effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles. Applied Physics Letter, 78(6), 718–720.

Heris, S. Z., Esfahany, M. N., & Etemad, G. S. (2007). Experimental investigation of convective heat transfer of Al2O3/water nanofluid in circular tube. International Journal of Heat and Fluid Flow, 28, 203–210.

Kakaç, S., & Pramuanjaroenkij, A. (2009). Review of convective heat transfer enhancement with nanofluids. International Journal of Heat and Mass Transfer, 52, 3187–3196.

Lecjaks, Z., Machac, I., & Sir, J. (1987). Heat transfer to a Newtonian liquid flowing through a tube with an internal helical element. International Chemical Engineering, 27, 210–217.

Lee. S., Choi, S. U. S., Li, S., & Eastman, J. A. (1999). Measuring thermal conductivity of fluids containing oxide nanoparticles. Journal of heat transfer, 121, 208–289.

Lopina, R. F., & Bergles, A. E. (1969). Heat transfer and pressure drop in tape- generated swirl flow of single phase water. Journal of Heat Transfer, 91, 434– 442.

Masuda, H., Ebata, A., Teramae, K., & Hishinuma, N. (1993). Altration of thermal conductivity and viscosity of liquid by dispersing ultra-fine particles (dispersion of γ-Al2O3, SiO2 and TiO2 ultra-fine particles). Netsu Bussei (in Japanese), 4(4), 227–233.

Moody, L. F. (1944). Friction factor for pipe flow. Transactions of ASME, 66, 671– 684.

Namburu, P. K., Das, D. K., Tanguturi, K. M., & Vajjha, R. K. (2009). Numerical study of turbulent flow and heat transfer characteristics of nanofluids considering variable properties. International Journal of Thermal Sciences, 48(2), 290–302.

Pak, B. C., & Cho, Y. I. (1998). Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles. Experimental Heat Transfer, 11, 151–170.

Palm, S. J., Roy, G., & Nguyen, C. T. (2004). Heat transfer enhancement in radial flow cooling system-using nanofluid. In: Proceeding of the ICHMT Inter. Symp. Advance Comp. Heat Transfer, Norway, CHT-04-121.

Roy, G., Nguyen, C. T., & Lajoie, P. R. (2004). Numerical investigation of laminar flow and heat transfer in a radial flow cooling system with the use of nanofluids. Superlattices and Microstructures, 35(3), 497–511.

Sarma, P. K., Subramanyam, T., Kishore, P. S., Dharma Rao, V., & Kakac, S. (2003). Laminar convective heat transfer with twisted tape inserts in a tube, International Journal of Thermal Sciences, 42, 821–828.

Sharma, K. V., Sundar, L. S., & Sarma, P. K. (2009). Estimation of heat transfer coefficient and friction factor in the transition flow with low volume concentration of Al2O3 nanofluid flowing in a circular tube and with twisted tape insert. International Communications in Heat and Mass Transfer, 36, 503–507.

Smithberg, E., & Landis, F. (1964). Friction and forced convective heat transfer characteristics in tube with twisted-tape swirl generators. Journal of Heat Transfer, 86, 39–49.

Sundar, L. S., Ramanathan, S., Sharma, K. V., & Sekhar Babu, P. (2007). Temperature dependent flow characteristics of Al2O3 nanofluid. International Journal of Nanotechnology and Applications, 1(2), 35–44.

Sundar, L. S., & Sharma, K. V. (2008). Thermal conductivity enhancement of nanoparticles in distilled water. International Journal of Nanoparticles, 1(1), 66–77.

Sundar, L. S., & Sharma, K. V. (2010). Turbulent heat transfer and friction factor of Al2O3 nanofluid in circular tube with twisted tape inserts. International Journal of Heat and Mass Transfer, 53, 1409–1416.

Wang, X, Q., & Mujumdar, A. S. (2007). Heat transfer characteristics of nanofluids: a review. International Journal of Thermal Sciences, 46, 1–19.

Wang, X., Xu, X., & Choi, S. U. S. (1999). Thermal conductivity of nanoparticles-fluid mixture. Journal of Thermophysics Heat Transfer, 13(4), 474–480.

Wen, D., & Ding, Y. (2004). Experimental investigation into convective heat transfer of nanofluid at the entrance region under laminar flow conditions. International Journal of Heat and Mass Transfer, 47(24), 5181–5188.

Xuan, Y., & Li, Q. (2003). Investigation on convective heat transfer and flow features of nanofluids. Journal of Heat Transfer, 125, 151–155.