Numerical Investigation of Natural Convection of Nanofluids in L-Shaped Enclosures

Abstract:

This paper presents numerical investigations of the thermal and fluid flow behavior in an L-shaped of cavity filled with nanofluid. For this purpose, five different water based Cu nanoparticles were selected with concentration of 1%, 3% and 5% were used. Effects of the presence of nanoparticles on the thermal and fluid flow in the enclosure were investigated in different Rayleigh number (Ra = 10³, 10⁴ and 10⁵). Results show that the characteristic of flow and heat transfer are mainly dependent on the dimensionless Rayleigh number. We also found that the presence of nanoparticle enhances the heat transfer rate in the enclosure.

• Periodical: Advanced Materials Research (Volume 849)
• Pages: 391-396
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.849.391
• Online since: November 2013
• Authors: Nor Azwadi Che Sidik*, Arman Safdari
• Keywords: L-Shape Enclosure, Nanofluid, Natural Convection, Numerical Method, Nusselt Number

References

[1] M. Shahi, A.H. Mahmoudi and F. Talebi: Numerical simulation of steady natural convection heat transfer in a 3-dimensional single-ended tube subjected to a nanofluid, Intl. Comm. Heat Mass Trans. Vol. 37 (2010), pp.1535-1545.

DOI: 10.1016/j.icheatmasstransfer.2010.08.005

[2] E.A. Nada and F.O. Hakan: Effects of inclination angle on natural convection in enclosures filled with Cu–water nanofluid, Intl. J. Heat Fluid Flow Vol. 30 (2009), pp.669-678.

DOI: 10.1016/j.ijheatfluidflow.2009.02.001

[3] M. Mahmoodi: Numerical simulation of free convection of nanofluid in a square cavity with an inside heater, Intl. J. Thermal Sci. Vol. 50 (2011), pp.2161-2175.

DOI: 10.1016/j.ijthermalsci.2011.05.008

[4] M. Mahmoodi and M.H. Seyed: Numerical study of natural convection of a nanofluid in C-shaped enclosures, Intl. J. Thermal Sci. Vol. 55 (2012), pp.76-89.

DOI: 10.1016/j.ijthermalsci.2012.01.002

[5] E. Fattahi, M. Farhadi, K. Sedighi and H. Nemati: Lattice Boltzmann simulation of natural convection heat transfer in nanofluids, Intl. J. Thermal Sci. Vol. 52 (2012) pp.137-144.

DOI: 10.1016/j.ijthermalsci.2011.09.001

[6] M.A. Mansour, R.A. Mohamed, M.M. Abd-Elaziz and S.A. Ahmed: Numerical simulation of mixed convection flows in a square lid-driven cavity partially heated from below using nanofluid, Intl. Comm. Heat Mass Trans. Vol. 37 (2010), pp.1504-1512.

DOI: 10.1016/j.icheatmasstransfer.2010.09.004

[7] S. Suresh, M. Chandrasekar and A.B. Chandra: Experimental investigations and theoretical determination of thermal conductivity and viscosity of Al2O3/water nanofluid, Exp. Thermal Fluid Sci. Vol. 34 (2010), pp.210-216.

DOI: 10.1016/j.expthermflusci.2009.10.022

[8] K. Khanafer, V. Kambiz and L. Marilyn: Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids, Intl. J. Heat Mass Trans. Vol. 46 (2003), pp.3639-3653.

DOI: 10.1016/s0017-9310(03)00156-x

[9] G.H.R. Kefayati, S.F. Hosseinizadeh, M. Gorji and H. Sajjadi: Lattice Boltzmann simulation of natural convection in an open enclosure subjugated to water/copper nanofluid, Intl. J. Thermal Sci. Vol. 52 (2012), pp.91-101.

DOI: 10.1016/j.ijthermalsci.2011.09.005

[10] T. Parametthanuwat, S. Rittidech and A. Pattiya: A correlation to predict heat-transfer rates of a two-phase closed thermosyphon (TPCT) using silver nanofluid at normal operating conditions, Intl. J. Heat Mass Trans. Vol. 53 (2010), pp.4960-4965.

DOI: 10.1016/j.ijheatmasstransfer.2010.05.046

[11] W. Khwanchit and E. Smith: Heat transfer enhancement by using CuO/water nanofluid in corrugated tube equipped with twisted tape, Intl. Comm. Heat Mass Trans. Vol. 39 (2012), pp.251-257.

DOI: 10.1016/j.icheatmasstransfer.2011.11.010

[12] A. Ghadimi, R. Saidur and H.S.C. Metselaar: A review of nanofluid stability properties and characterization in stationary conditions, Intl. J. Heat Mass Trans. Vol. 54 (2011), pp.4051-4068.

DOI: 10.1016/j.ijheatmasstransfer.2011.04.014

[13] C. Saidi, F. Legay and B. Pruent: Laminar flow past a sinusoidal cavity, Intl. J. Heat Mass Trans. Vol. 30 (1987), p.649–660.

DOI: 10.1016/0017-9310(87)90195-5

[14] M. Shohel, K.D. Prodip, H. Nasim and A.K.M. Sadrul Islam: Free convection in an enclosure with vertical wavy walls, Intl. J. Thermal Sci. Vol. 41 (2002), pp.440-446.

DOI: 10.1016/s1290-0729(02)01336-4

[15] S.H. Tasnim and S. Mahmud: Laminar free convection inside an inclined L-shaped enclosure, Intl. Comm. Heat Mass Trans. Vol. 33 (2006), pp.936-942.

DOI: 10.1016/j.icheatmasstransfer.2006.05.008

[16] R.B. Chinnakotla, D. Angirasa and R.L. Mahajan: Parametric study of buoyancy-induced flow and heat transfer from L-shaped corners with asymmetrically heated surfaces, Intl J. Heat Mass Trans. Vol. 39 (1996), pp.851-865.

DOI: 10.1016/0017-9310(95)00160-3

[17] M. Mahmoodi: Numerical simulation of free convection of a nanofluid in L-shaped cavities, Intl. J. Thermal Sci. Vol. 50 (2011), pp.1731-1740.

DOI: 10.1016/j.ijthermalsci.2011.04.009

[18] K. Mohammad, A. Abbas, S.A. Majid and H. Jens: Eulerian–Eulerian two-phase numerical simulation of nanofluid laminar forced convection in a microchannel, Intl J. Heat Fluid Flow Vol. 32 (2011), pp.107-116.

DOI: 10.1016/j.ijheatfluidflow.2010.08.001

[19] D.A. Nield and A.V. Kuznetsov: The onset of double-diffusive convection in a nanofluid layer, Intl. J. Heat Fluid Flow Vol. 32 (2011), pp.771-776.

DOI: 10.1016/j.ijheatfluidflow.2011.03.010