EFFECTS OF AN ADIABATIC FIN ON THE MIXED CONVECTION HEAT TRANSFER IN A SQUARE CAVITY WITH TWO VENTILATION PORTS

Abstract

In this study, a square cavity with two ventilation ports in the presence of an adiabatic fi n of different lengths placed on the walls of the cavity is numerically analyzed for the mixed convection case for a range of Richardson numbers (Ri=0.1,1, 10, 100) and at Reynolds number of 300. The effect of the fin height, placement of the fin on each of the four walls of the cavity and Richardson number on the heat transfer and fluid flow characteristics is numerically analyzed. The results are presented in terms of streamlines, isotherm plots and averaged Nusselt number plots. It is observed that for the convection dominated case, fin length and its position on the one of the four walls of the cavity do not alter the thermal performance whereas when the buoyancy effects become important thermal performance increases for high n length.

Keywords

Dates

  • Submission Date2012-06-08
  • Revision Date2013-04-04
  • Acceptance Date2013-04-24
  • Online Date2013-05-05

DOI Reference

10.2298/TSCI120608047S

References

  1. Aminossadati, S. M, Ghasemi, A., A numerical study of mixed convection in a horizontal channel with a discrete heat source in an open cavity, European Journal of Mechanics, 28 (2009), pp. 590-598
  2. Boutina, L., Bessaih, R., Numerical simulation of mixed convection air-cooling of electronic components mounted in an inclined channel, Applied Thermal Engineering, 31 (2011), pp. 2052-2062
  3. Saeidi, S., Khodadadi, J., Transient Flow and heat transfer leading to periodic state fin a cavity with inlet and outlet ports due to incoming flow oscillation, International Journal of Heat and Mass Transfer, 50 (2007), pp. 530-538
  4. Selimefendigil, F., Oztop, H., Fuzzy-based estimation of mixed convection heat transfer in a square cavity in the presence of an adiabatic inclined fin, International Communications in Heat and Mass Transfer, 39 (2012), pp. 1639-1646
  5. Mahmoud, H., Kriaa, W., Mhiri, H., Le Palec, G., Bournot, P., Numerical Analysis of Recirculation Bubble Sizes of Turbulent Co-Flowing Jet, Engineering Applications of Computational Fluid Mechanics, 6(1) (2012), pp. 58-73
  6. Chau, K.W. and Jiang, Y.W., A three-dimensional pollutant transport model in orthogonal curvilinear and sigma coordinate system for Pearl river estuary, International Journal of Environment and Pollution, 21(2) (2004), pp. 188-198
  7. Margot, X., Hoyas, S., Gil, A., Patouna, S., Numerical Modelling of Cavitation: Validation and Parametric Studies, Engineering Applications of Computational Fluid Mechanics, 6(1) (2001), pp. 15-24
  8. Chau, K.W., Jiang, Y.W., 3D numerical model for Pearl River estuary, Journal of Hydraulic Engineering, 127(1) (2001), pp. 72-82
  9. Sourtiji, E., Hosseinizadeh, S., Gorji-Bandpy, M., Ganji, D., Heat transfer enhancement of mixed convection in a square cavity with inlet and outlet ports due to oscillation of incoming flow, International Communications in Heat and Mass Transfer, 38 (2011), pp. 806-814
  10. Oztop, H. F., Influence of exit opening location on mixed convection in a channel with volumetric heat sources, International Communications in Heat and Mass Transfer, 37 (2010), pp. 410-415
  11. Shi, X., Khodadadi, J., Laminar Fluid flow and heat transfer in a lid-driven cavity due to a thin fin, J. Heat Transfer, 124 (2002), pp. 1056-1063
  12. Lakhal, E.K., Hasnaoui, M., Bilgen, E., Vasseur, P., Natural convection in inclined rectangular enclosures with perfectly conducting fins attached on the heated wall, Heat and Mass Transfer, 32 (1997), pp. 365-373
  13. Varol, Y., Oztop, H.F., Varol, A., Effects of thin fin on natural convection in porous triangular enclosures, International Journal of Thermal Sciences, 46 (2007), pp. 1033-1045
  14. Shaw, H.J., Chen, C.K., Cleaver, J. W., Cubic spline numerical solution for two dimensional natural convection in a partially divided enclosure, Numerical Heat Transfer, 12 (1987), pp. 439-455
  15. Fluent Inc., FLUENT user's guide, Lebanon, NH, 2005.
Volume 18, Issue 2, Pages377 -389