Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2012.1396.1401H. BallaHyderAbdullahShahrirZulkifliRozliMohd FaizalWanSopianKamaruzaman1220121213Laminar flow and heat transfer of different nanofluids particles in water, namely Al_{2}O_{3}, CuO and TiO_{2}, flowing through a circular tube under constant heat flux conditions have been numerically analyzed. The investigation was performed for nanoparticles of size 100 nm. The numerical results obtained are compared with existing well-established correlations. The prediction for the Nusselt number for nanofluids agrees well with the Pak-Choi correlation. The thermophysical properties of the nanofluids are estimated by using the equations available in literature. Comparison of convective heat transfer coefficients for Al_{2}O_{3}, CuO and TiO_{2} based nanofluids are presented. It is found that pressure loss increases with the particle volume concentration. However, the flow demonstrates enhancement in heat transfer which becomes better with the increase in the Reynolds number of the flow, but is accompanied with an increase in shear stress.]]>Akbarinia, A. and A. Behzadmehr,2007Anoop, K.B., T. Sundararajan and S.K. Das,2009Zamzamian, A., S.N. Oskouie, A. Doosthoseini, A. Joneidi and M. Pazouki,2011Bianco, V., F. Chiacchio, O. Manca and S. Nardini,2009Das, S.K., N. Putra, P. Thiesen and W. Roetzel,2003Dittus, F.W. and L.M.K. Boelter,1930Drew, D.A. and S.L. Passman,1999Eastman, J.A., S.U.S. Choi, S. Li, W. Yu and L.J. Thompson,2001Khoddamrezaee, F., R. Motallebzadeh and D. Jajali Vahid,20102O_{3}) nanofluid through the shell and tube heat exchanger with rectangular arrangement of tubes and constant heat flux.]]>Gherasim, I., G. Roy and C. Tam,2009He, Y., Y. Mena, Y. Zhao, H. Lu and Y. Ding,2009Li, Q. and Y. Xuan,2000Maiga, S.E.B., C.T. Nguyen, N. Galanis and G. Roy,2004Pak, B.C. and Y.I. Cho,1998Rezaee, F.K. and A. Tayebi,2010Sundar, L.S., K.V. Sharma and S. Ramanathan,2007Shah, R.K.,2006Wen, D. and Y. Ding,2004Xuan, Y. and W. Roetzel,2000Xuan, Y. and Q. Li, 2003Yang, Y., Z.G. Zhang, E.A. Grulke, W.B. Anderson and G. Wu,2005