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Mixed Convective Heat Transfer in Water-Based Al2O3 Nanofluid in Horizontal Rectangular Duct

Authors: Nur Irmawati, H.A. Mohammed


In the present study, mixed convection in a horizontal rectangular duct using Al2O3 is numerically investigated. The effects of different Rayleigh number, Reynolds number and radiation on flow and heat transfer characteristics are studied in detail. This study covers Rayleigh number in the range of 2 × 10^6 ≤ Ra ≤ 2 × 10^7 and Reynolds number in the range of 100 ≤ Re ≤ 1100. Results reveal that the Nusselt number increases as Reynolds and Rayleigh numbers increase. It is also found that the dimensionless temperature distribution increases as Rayleigh number increases.

Keywords: Numerical simulation, Mixed convection, Horizontal rectangular duct, Nanofluids.

Digital Object Identifier (DOI):

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[1] C. C. Huang and T. F. Lin, “Buoyancy Induced Flow Transition Aiding Convection Flow of Air through a Bottom Heated Horizontal Rectangular Duct”, Int. J. of Heat Mass Transfer, Vol. 37, 1994, pp. 1235-1255.
[2] W. M. Yan, “Combined Buoyancy Effects of Thermal and Mass Diffusion on Laminar Forced Convection in Horizontal Rectangular Ducts”, Int. J. of Heat Mass Transfer, Vol. 39 (7), 1996, pp. 1479-1488.
[3] H. C. Chiu, J. H. Jang and W. M. Yan, “Mixed Convection Heat Transfer in Horizontal Rectangular Ducts with Radiation Effects”, Int. J. of Heat Mass Transfer, Vol. 50, 2007, pp. 2874-2882.
[4] P. Payzar, “Heat Transfer Enhancement in Laminar Flow of Viscoelastic Fluids through Rectangular Ducts”, Int. J. of Heat Mass Transfer, Vol.40, No.3, 1997, pp.745-756.
[5] P. Talukdar, and M. Shah, “Analysis of Laminar Mixed Convective Heat Transfer in Horizontal Triangular Ducts”, Numerical Heat Transfer, Vol.54, No.12, 2008, pp.1148- 1168.
[6] H. C. Brinkman, “The Viscosity of Concentrated Suspensions and Solutions”, Journal Chemical Physics, Vol. 20, 1952, pp.571-581.
[7] K. Khanafer, K Vafai, and M. Lighstone, “Buoyancy-Driven Heat Transfer Enhancement in a Two-Dimensional Enclosure Utilizing Nanofluids”, Int. J. of Heat Mass Transfer, Vol.46, 2003, pp.3639-3653.