Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30523
Experimental Investigation of Heat Transfer and Flow of Nano Fluids in Horizontal Circular Tube

Authors: Sattar Al-Jabair, Abdulhassan Abd. K, Khalid Sultan

Abstract:

We have measured the pressure drop and convective heat transfer coefficient of water – based AL(25nm),AL2O3(30nm) and CuO(50nm) Nanofluids flowing through a uniform heated circular tube in the fully developed laminar flow regime. The experimental results show that the data for Nanofluids friction factor show a good agreement with analytical prediction from the Darcy's equation for single-phase flow. After reducing the experimental results to the form of Reynolds, Rayleigh and Nusselt numbers. The results show the local Nusselt number and temperature have distribution with the non-dimensional axial distance from the tube entry. Study decided that thenNanofluid as Newtonian fluids through the design of the linear relationship between shear stress and the rate of stress has been the study of three chains of the Nanofluid with different concentrations and where the AL, AL2O3 and CuO – water ranging from (0.25 - 2.5 vol %). In addition to measuring the four properties of the Nanofluid in practice so as to ensure the validity of equations of properties developed by the researchers in this area and these properties is viscosity, specific heat, and density and found that the difference does not exceed 3.5% for the experimental equations between them and the practical. The study also demonstrated that the amount of the increase in heat transfer coefficient for three types of Nano fluid is AL, AL2O3, and CuO – Water and these ratios are respectively (45%, 32%, 25%) with insulation and without insulation (36%, 23%, 19%), and the statement of any of the cases the best increase in heat transfer has been proven that using insulation is better than not using it. I have been using three types of Nano particles and one metallic Nanoparticle and two oxide Nanoparticle and a statement, whichever gives the best increase in heat transfer.

Keywords: Newtonian, Brownian motion, NUR factor

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333342

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1550

References:


[1] Yu, W., Franee, D.M., Routbort, J.L., Choi, S.U., 2008.Rewiew and comparison of Nano fluid thermal conductivity and heat transfer enhancements. Heat transfer engineering.29 (15), 432-460(1).
[2] Choi, S.U.S., Enhancing Thermal Conductivity of Fluids with Nano particles: Developments and Applications of Non-Newtonian Flows, America Society of Mechanical Engineers (ASME) 66 (1995) pp. 99.
[3] Pak, B.C., Cho, Y.I., Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particle, Experimental Heat Transfer 11 (1998) pp. 151-170.
[4] Xuan, Y., Li, Q., Investigation of convective heat transfer and flow features of Nano fluids, Journal of Heat Transfer-Transaction of ASME 125 (2003) pp. 151- 156.
[5] Heris, S.Z., Etemad, S.G., Esfahany, M.S., Experimental investigation of oxide Nano fluids laminar flow convective heat transfer, International Communications in Heat and Mass Transfer 33 (2006) pp. 529-535.
[6] Lai, W.Y., Duculescu, B., Phelan, P.E., Prasher, R.S., Proceedings of ASME International Mechanical Engineering Congress and Exposition (IMECE 2006),Chicago, USA, 2006.
[7] Jung, J.Y., Oh, H.S., Kwak, H.Y., Proceedings of ASME International Mechanical Engineering Congress and Exposition (IMECE 2006), Chicago, USA, 2006.
[8] A. Einstein, Investigation on the theory of Brownian motion, Dover, New York, 1956.pp.1-18.
[9] H.C.B inkman, The viscosity of concentrated suspensions and solution. Chem. Phys .20(1952)571.
[10] X.Wang, X.Xu, S.U.S.Choi, Thermal conductivity of Nano particle - fluid mixture. Thermo phys .Heat transfer 13 (1999) 474-480.
[11] G.K.Batchelor, The effect of Brownian motion on the bulk stress in a suspension of spherical particles. J.Fluid mech.83 (1) (1977)97.
[12] J.M. Smith, H.C. Van Ness, Introduction to Chemical Engineering Thermodynamic, McGraw-Hill, New York, 1987.
[13] Hamilton, R.L. and O.K. Crosser, Thermal Conductivity of Heterogeneous 2-Component Systems. Industrial & Engineering Chemistry Fundamentals, 1962.1(3): p. 187.124.
[14] Timofeeva, E.V., A.N. Gavrilov, J.M. McCloskey, Y.V. Tolmachev, S. Sprunt,L.M. Lopatina, and J.V. Selinger, Thermal conductivity and particle agglomeration in alumina Nano fluids: Experiment and theory. Physical Review E, 2007.76(6): p. 16.
[15] Wesley Charles Williams, "Experimental and Theoretical Investigation of Transport Phenomena in Nano particle Colloids (Nano fluids)", Department of Nuclear Science and Engineer at Massachusetts Institute of Technology, December (2006).
[16] Yu, W. and S.U.S. Choi, The role ofinterfacial layers in the enhanced thermal conductivity of Nano fluids: A renovated Maxwell model. Journal of Nano particle Research, 2003.5(1-2): p. 167-171.
[17] Y. Xuan, W. Roetzel, Conceptions for heat transfer correlation of Nano fluids,Int. J. Heat Mass Transfer 43 (2000) 3701-3707.
[18] B.C.Pak,Y.I Cho, Hydrodynamic and heat transfer study of dispersed fluids with sub micro metallic oxide particles, Exp. Heat transfer 11(1998)151.
[19] R.K. Shah, A.L. London, Laminar flow forced convection in ducts, Supplement 1 to Advances in Heat Transfer, Academic Press, New York, 1978.
[20] R.K. Shah, M.S. Bhatti, Laminar convective heat transfer in ducts, in: S. Kakac,R.K. Shah, W. Aung (Eds.), Handbook of Single-Phase Convective Heat Transfer, Wiley, New York, 1987 (Chapter 3).W.-K. Chen, Linear Networks and Systems (Book style). Belmont,CA: Wadsworth, 1993, pp. 123-135.