ENHANCEMENT OF NATURAL CONVECTION HEAT TRANSFER IN A U-SHAPED CAVITY FILLED WITH AL2O3-WATER NANOFLUID
Abstract
This paper investigates the natural convection heat transfer enhancement of
l2O3-water nanofluid in a U-shaped cavity. In performing the analysis, the governing
quations are modeled using the Boussinesq approximation and are
olved numerically using the finite-volume numerical method. The study examines
he effects of the nanoparticle volume fraction, the Rayleigh number and
he geometry parameters on the mean Nusselt number. The results show that for
ll values of the Rayleigh number, the mean Nusselt number increases as the volume
raction of nanoparticles increases. In addition, it is shown that for a given
ength of the heated wall, extending the length of the cooled wall can improve the
eat transfer performance.
Dates
- Submission Date2012-08-13
- Revision Date2012-09-03
- Acceptance Date2012-09-12
References
- Choi, S. U. S., Enhancing Thermal Conductivity of Fluids with Nanoparticles. in: Developments and Applications of Non-Newtonian Flows (Eds. D. A. Siginer, H. P. Wang ), ASME, FED-231/MD-66 (1995) pp. 99-105
- Das, S. K., Choi, S. U. S., Patel, H. E., Heat Transfer in Nanofluids - a Review, Heat Transfer Engineering, 27 (2006) 10, pp. 3-19
- Kakac, S., Pramuanjaroenkij, A., Review of Convective Heat Transfer Enhancement with Nanofluids, International Journal of Heat and Mass Transfer, 52 (2009), 13-14, pp. 3187-3196
- Sridhara, V., Satapathy, L. N., Al2O3-based Nanofluids: a Review. Nanoscale Research Letters, 6 (2011), 1, pp. 1-16
- Ostrach, S., Natural Convection in Enclosures. ASME Journal of Heat Transfer, 110 (1988), 4B, pp. 1175-1190
- Khanafer, K., Vafai, K., Lightstone, M., Buoyancy-Driven Heat Transfer Enhancement in a Two- Dimensional Enclosure Utilizing Nanofluids. International Journal of Heat and Mass Transfer, 46 (2003), 19, pp. 3639-3653
- Oztop, H. F., Abu-Nada, E., Numerical Study of Natural Convection in Partially Heated Rectangular Enclosures Filled with Nanofluids, International Journal of Heat and Fluid Flow, 29 (2008), 5, pp. 1326-1336
- Kahveci, K., Buoyancy Driven Heat Transfer of Nanofluids in a Tilted Enclosure. ASME Journal of Heat Transfer, 132 (2010), 6, pp. 062501
- Mahmoodi, M., Numerical Simulation of Free Convection of a Nanofluid in L-Shaped Cavities. International Journal of Thermal Sciences, 50 (2011), 9, pp. 1731-1740
- Cho, C. C., Chen, C. L., Chen, C. K., Natural Convection Heat Transfer Performance in Complex- Wavy-Wall Enclosed Cavity Filled with Nanofluid, International Journal of Thermal Sciences, 60 (2012), pp. 255-263
- Patankar, S. V., Numerical Heat Transfer and Fluid Flow, McGraw-Hill, New York, 1980
- De Vahl Davis, G., Natural Convection of Air in a Square Cavity a Bench Mark Numerical Solution. International Journal for Numerical Methods in Fluids, 3 (1983), 3, pp. 249-264
Volume
16,
Issue
5,
Pages1317 -1323