Mohammed, H.A. and Om, N.I. and Shuaib, N.H. and Hussein, A.K. and Saidur, Rahman
(2011)
*The application of nanofluids on three dimensional mixed convection heat transfer in equilateral triangular duct.*
International Journal of Heat and Technology, 29 (2).
pp. 3-12.
ISSN 03928764,

## Abstract

In this work numerical predictions of mixed convective nanofluids flow and heat transfer in an equilateral triangular duct are reported. Three dimensional, laminar Navier-Stokes and energy equations were solved using the finite volume method. Pure water and four different types of nanofluids such as Ag, Au, Cu, diamond and SiO 2 with volume fractions range of 1 â�¤; Î¦ â�¤; 5 are used. This investigation covers Rayleigh number in the range of 1Ã� 10 4 â�¤ Ra â�¤ 1Ã� 10 6 and Reynolds number in the range of 100 â�¤ Re â�¤ 1000. The effects of different Rayleigh numbers, Reynolds numbers, nanofluid types, volume fractions of nanofluid, apex angles of the traingular duct, and radiation are investigated. The results presented in terms of streamlines, isotherms, Nusselt number, and pressure drop. The results revealed that the Nusselt number increases as Rayleigh number increases due to the buoyancy force effect. It is found that SiO 2 nanofluid has the highest Nusselt number while Au nanofluid has the lowest Nusselt number among other nanofluids. The apex angle of the triangular duct has remarkable influence on the Nusselt number. An increasing of the duct apex angle decreases the Nusselt number value. The pressure drop increases as Reynolds number increases and apex angle decreases.

Item Type: | Article |
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Funders: | UNSPECIFIED |

Additional Information: | Export Date: 6 December 2012 Source: Scopus CODEN: HETEE Language of Original Document: English Correspondence Address: Mohammed, H.A.; Department of Mechanical Engineering, College of Engineering, Universiti Tenaga Nasional, Km 7, Jalan Kajang-Puchong, 43900 Kajang, Selangor, Malaysia References: Daungthongsuk, W., Wongwises, S., A critical review of convective heat transfer of nanofluids (2007) Renewable and Sustainable Energy Reviews, 11 (5), pp. 797-817. , DOI 10.1016/j.rser.2005.06.005, PII S1364032105000626; Trisaksri, V., Wongwises, S., Critical review of heat transfer characteristics of nanofluids (2007) Renewable and Sustainable Energy Reviews, 11 (3), pp. 512-523. , DOI 10.1016/j.rser.2005.01.010, PII S1364032105000444; Wang, X.-Q., Mujumdar, A.S., Heat transfer characteristics of nanofluids: A review (2007) International Journal of Thermal Sciences, 46 (1), pp. 1-19. , DOI 10.1016/j.ijthermalsci.2006.06.010, PII S1290072906001190; Salmun, H., Convection patterns in a triangular domain (1995) Int. J. Heat Mass Transfer, 38 (2), pp. 351-362; Etemad, S.G., Mujumdar, A.S., Nassef, R., Simultaneously developing flow and heat transfer of non-ncwtonian fluids in equilateral triangular duct (1996) App. Math. Modelling, 20, pp. 898-908; Etemad, S.G., Mujumdar, A.S., Nassef, R., Viscous non-newtonian forced convection heat transfer in semi-circular and equilateral triangular ducts, an experimental study (1997) Int. J. Heat Mass Transfer, 24 (5), pp. 609-620; Leung, C.W., Probert, S.D., Forced-convective turbulent-flows through horizontal ducts with isosceles-traingular internal cross-sections (1997) App. Energy, 57 (1), pp. 13-24; Hashemabadi, S.H., Etemad, S.Gh., Golkar, N.M.R., Thibault, J., Laminar flow of non-newtonian fluid in right triangular ducts (2003) International Communications in Heat and Mass Transfer, 30 (1), pp. 53-60. , DOI 10.1016/S0735-1933(03)00007-1, PII S0735193303000071; Omri, A., Najjari, M., Nasrallah, S.B., Numerical analysis of natural buoyancy-induced regimes in isosceles triangular cavities (2007) Numerical Heat Transfer; Part A: Applications, 52 (7), pp. 661-678. , DOI 10.1080/10407780701339967, PII 782048502; Lei, C.W., Armfiled, S.W., Patterson, J.C., Unsteady natural convection in a water-filled isosceles triangular enclosure heated from below (1998) Int. J. Heat Mass Transfer, 51, pp. 2673-12650; Talukdar, P., Shah, M., Analysis of laminar mixed convective heat transfer in horizontal triangular ducts (2008) Numer. Heat Transf, 54 (12), pp. 1148-1168; Chiu, H.C., Jang, J.H., Yan, W.M., Mixed convection heat transfer in horizontal rectangular ducts with radiation effects (2007) Int. J. Heat Mass Transfer, 50, pp. 2874-2882; Corcione, M., Heat transfer features of buoyancydriven nanofluids inside rectangular enclosures differentially heated at the sidewalls (2010) Int. J. Therm. Sci., 49, pp. 1536-1546; Khanafer, K., Vafai, K., Lightstone, M., Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids (2003) International Journal of Heat and Mass Transfer, 46 (19), pp. 3639-3653. , DOI 10.1016/S0017-9310(03)00156-X; Anderson, J.D., (1995) Computational Fluid Dynamic: The Basics with Applications, , McGraw-Hill, New York; Patankar, S.V., (1980) Numerical Heat Transfer and Fluid Flow, , Hemisphere Publishing Corporation, Taylor and Francis Group, New York; Versteeg, H.K., Malalasekera, W., (1995) An Introduction to Computational Fluid Dynamics: The Finite Volume Method, , John Wiley and Sons Inc, New York |

Uncontrolled Keywords: | Heat transfer enhancement, Mixed convection, Nanofluids, Numerical modeling, Triangular duct, Apex angles, Buoyancy forces, Energy equation, Flow and heat transfer, Mixed convective, Nano-fluid, Navier Stokes, Numerical predictions, Pure water, Rayleigh number, Ducts, Finite volume method, Navier Stokes equations, Nusselt number, Pressure drop, Radiation effects, Reynolds number, Silicon compounds, Three dimensional, Nanofluidics. |

Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery |

Divisions: | Faculty of Engineering |

Depositing User: | Mr Jenal S |

Date Deposited: | 05 Jul 2013 01:59 |

Last Modified: | 25 Oct 2019 06:14 |

URI: | http://eprints.um.edu.my/id/eprint/6691 |

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