The study of buoyancy driven flow within bottom-heated vertical concentric cylindrical enclosure was important with respect to the processes in chemical and nuclear industries. In this research paper, experimental and numerical study of the axial temperature gradient and the heat transfer mechanism within the enclosure were performed. The numerical simulations were validated by comparing the numerical results with experimentally measured axial temperature. The numerical results of the streamlines within the enclosure depicted the real picture of the buoyancy effects. Eighteen different experiments were performed by using inner cylinder of different materials and outer cylinder of different diameters within the bottom disc temperature range of 353 - 433 K. The CFD simulations were performed to study the buoyancy effects within the enclosure. At the bottom disc with temperature up to 393 K, the streamlines within the inner cylinder were almost the same for both con- figurations being independent of outer cylinder diameter, while at 433 K streamlines within the inner cylinders varied. With larger diameter outer cylinder configuration, the buoyancy effects in the outer annulus were stronger as compared to smaller one.
Cite this paper
Malik, A. , Khushnood, S. and Shah, A. (2013) Experimental and numerical study of buoyancy driven flow within a bottom heated vertical concentric cylindrical enclosure. Natural Science, 5, 771-782. doi: 10.4236/ns.2013.57093.
 Sharma, A.K., Velusamy, K. and Balaji, C. (2008) Conjugate transient natural convection in a cylindrical enclosure with internal volumetric heat generation. Annals of Nuclear Energy, 35, 1502-1514.
 Franke, M.E. and Hutson, K.E. (1984) Effects of corona discharge on free-convection heat transfer inside a vertical hollow cylinder. Journal of Heat Transfer, 106, 346-351. doi:10.1115/1.3246679
 Roschina, N.A., Uvarov, A.V. and Osipov, A.I. (2005) Natural convection in an annulus between coaxial horizontal cylinders with internal heat generation. International Journal of Heat and Mass Transfer, 48, 4518-4525.
 Bairi, A. (2003) Transient natural 2D convection in a cylindrical cavity with the upper face cooled by thermoelectric peltier effect following an exponential law. Applied Thermal Engineering, 23, 431-447.
 Lemembre, A. and Petit J.-P. (1998) Laminar natural convection in a laterally heated and upper cooled vertical cylindrical enclosure. International Journal of Heat and Mass Transfer, 41, 2437-2454.
 Chen, S.A.H. and Humphrey, J.A.C. (1987) Steady, two dimensional, natural convection in rectangular enclosures with differently heated walls. Journal of Heat Transfer, Transactions of the ASME, 109, 400-406.
 Kee, R.J., Landram, C.S. and Miles, J.C. (1976) Natural convection of a heat generating fluid within closed vertical cylinders and spheres. Journal of Heat Transfer, Transactions of the ASME, 98, 55-61.
 Kim, D.M. and Viskanta, R. (1985) Effect of wall heat conduction on natural convection heat transfer in a square enclosure. Journal of Heat Transfer, Transactions of the ASME, 107, 139-146.
 Vargas, M., Sierra, F.Z., Ramos, E. and Avramenko, A.A. (2002) Steady natural convection in a cylindrical cavity. International Communication of Heat and Mass Transfer, 29, 213-221. doi:10.1016/S0735-1933(02)00312-3
 Bohn, M.S. and Anderson, R. (1986) Temperature and heat flux distribution in a natural convection enclosure flow. Journal of Heat Transfer, Transactions of the ASME, 108, 471-476.
 Glakpe, E.K., Watkins, C.B. and Kurien, B.J. (1986) Effect of radiation and specified heat flux on natural convection in a vertical region with a rectangular inner boundary. 4th Joint Thermodynamics and Heat Transfer Conferences on AIAA and ASME, Boston, 2-4 June 1986, 10 pages.
 Liaqat, A. and Baytas, A.C. (2001) Conjugate natural convection in a square enclosure containing volumetric sources. International Journal of Heat and Mass Transfer, 44, 3273-3280.
 Kuznetsov, C.V. and Sheremet, M.A. (2009) Conjugate heat transfer in an enclosure under the condition of internal mass transfer and in the presence of the local heat source. International Journal of Heat and Mass Transfer, 52, 1-8. doi:10.1016/j.ijheatmasstransfer.2008.06.034
 Malik, A.H., et al. (2012) Experimental study of conjugate heat transfer within a bottom heated vertical concentric cylindrical enclosure. International Journal of Heat and Mass Transfer, 55, 1154-1163.
 Fluent (2006) Fluent 6.3 user’s guide. Fluent Inc.
 Rolf, H., Sabersky, A.J.A. and Hauptmann, E.G. (1971) Fluid flow: A first course in fluid mechanics. Macmillan Publishing Co., Inc., New York.
 White, F.M. (1986) Fluid mechanics. 2nd Edition, Mc Graw Hill Book Company, Blacklick, 732 pages.
 Daugherty, R.L., Franzini, J.B. and Finnemore, E.J. (1996) Fluid mechanics with engineering applications. McGraw Hill Book Company, Singapore.
 Wrobel, W., Fornalik-Wajs, E. and Szmyd, J.S. (2010) Experimental and numerical analysis of thermo-magnetic convection in a vertical annular enclosure. International Journal of Heat and Fluid Flow, 31, 1019-1031.
 Lin, W. and Armfield, S.W. (2001) Natural convection cooling of rectangular and cylindrical containers. International Journal of Heat and Fluid Flow, 22, 72-81.
 Papanicolaou, E. and Belessiotis, V. (2002) Transient natural convection in a cylindrical enclosure at high rayleigh numbers. International Journal of Heat and Mass Transfer, 45, 1425-1444.
 Corvaro, F. and Massimo, P. (2009) The natural convective heat transfer in a partially divided enclosure: A study on the influence of the source position. Journal of Thermodynamics, 1-11. doi:10.1155/2009/792370
 Kuznetsov, Geniy V. and Sheremet, Mikhail A. (2011) Conjugate natural convection in an enclosure with a heat source of constant heat transfer rate. International Journal of Heat and Mass Transfer, 54, 260-268.
 Aminossadati, S.M. and Ghasemi, B. (2005) The effects of orientation of an inclined enclosure on laminar natural convection. Heat and Technology, 23, 43-49.
 Nazrul, I., Gaitonde, U.N. and Sharma, G.K. (2001) Mixed convection heat transfer in the entrance region of horizontal annuli. International Journal of Heat and Mass Transfer, 44, 2107-2120.
 Sezai, I. and Mohamad, A.A. (2000) Natural convection heat transfer from a discrete heat source on the bottom of a horizontal enclosure. International Journal of Heat and Mass Transfer, 43, 2257-2266.
 Mazumder, S. (2007) On the use of the fully compressible navier stokes equations for the steady-state solution of natural convection problems in closed cavities. Journal of Heat Transfer, Transactions of the ASME, 129, 387-390.
 Bouali, H., Mezrhab, A., Amouli, H. and Bouzidi, M. (2006) Radiation-natural convection heat transfer in an inclined rectangular enclosure. International Journal of Thermal Sciences, 45, 553-566.
 Yu, E. and Joshi, Y.K. (1999) Heat transfer in discretely heated side-vented compact enclosures by combined conduction, natural convection and radiation. Journal of Heat Transfer, Transactions of the ASME, 121, 1002-1010.
 Chang, T.S. and Tsay, Y.L. (2001) Natural convection heat transfer in an enclosure with a heated background step. International Journal of Heat and Mass Transfer, 44, 3963-3971. doi:10.1016/S0017-9310(01)00035-7
 Zhao, F.-Y., Liu, D. and Tang, G.-F. (2008) Natural convection in an enclosure with localized heating and salting from below. International Journal of Heat and Mass Transfer, 51, 2889-2904.
 Cengel, Y.A. (2003) Heat transfers a practical approach. 2nd Edition, McGraw Hill Companies, Inc, New York.