## THERMAL SCIENCE

International Scientific Journal

### EFFECT OF THE INLET OPENING ON MIXED CONVECTION INSIDE A 3-D VENTILATED CAVITY

**ABSTRACT**

Mixed convection heat transfer in a three-dimensional ventilated cavity is studied numerically using finite volume method. The results are presented in terms of streamlines, temperature distribution, velocity fields, and average Nusselt number for different combinations of thermal and geometrical controlling parameters, namely, Reynolds number Re=100, Richardson number (0.01≤ Ri ≤ 10), relative height of the openings (B = h/L = 1/8) and relative width (0.5 ≤ A=w/L ≤ 1). The obtained results show that the flow intensity and the heat transfer rate can be significantly improved by an optimal choice of the mentioned parameters

**KEYWORDS**

PAPER SUBMITTED: 2017-01-26

PAPER REVISED: 2017-04-04

PAPER ACCEPTED: 2017-04-20

PUBLISHED ONLINE: 2017-05-06

**THERMAL SCIENCE** YEAR

**2018**, VOLUME

**22**, ISSUE

**6**, PAGES [2413 - 2424]

- Papanicolaou, E., Jaluria, Y., Mixed convection from an isolated heat source in a rectangular en-closure. Numerical Heat Transfer, 18 (1991), 4, pp. 427-461
- Papanicolaou, E., Jaluria, Y., Mixed convection from a localized heat source in a cavity with con-ducting walls: a numerical study. Numerical Heat Transfer, Part A Applications, 23 (1993), 4, pp. 463-484.
- Hsu, T. H., et al., Mixed convection in a partially divided rectangular enclosure. Numerical Heat Transfer, Part A Applications, 31 (1997), 6, pp. 655-683.
- Rahman, M., et al, Effects of Reynolds and Prandtl number on mixed convection in a ventilated cavity with a heat-generating solid circular block. Applied Mathematical Modelling, 36 (2012), 5, pp. 2056-2066.
- Aminossadati, S.M., Ghasemi, B., A numerical study of mixed convection in a horizontal channel with a discrete heat source in an open cavity. European Journal of Mechanics-B/Fluids, 28(2009), 4, pp. 590-598.
- Manca, O., et al., Experimental investigation of mixed convection in a channel with an open cavi-ty. Experimental heat transfer, 19 (2006), 1, pp. 53-68.
- Selimefendigil, F., Öztop, H. F., Effects of an adiabatic fin on the mixed convection heat transfer in a square cavity with two ventilation ports. Thermal Science, 18(2014), 2, pp. 377-389.
- Teamah, M.A., El-Maghlany, W.M., Numerical simulations of the effect of an isotropic heat field on the entropy generation due to natural convection in a square cavity, Energy Conversion and Management, 85 (2014),pp.333-342.
- M.A. Teamah, W.M. El-Maghlany, Augmentation of natural convective heat transfer in square cavity by utilizing nanofluids in the presence of magnetic field and uniform heat genera-tion/absorption, International Journal of Thermal Sciences, 58 (2012),pp. 130-142
- Teamah, M.A., El-Maghlany, W.M., Numerical simulation of double-diffusive mixed convec-tive flow in rectangular enclosure with insulated moving lid, International Journal of Thermal Sciences, 49 (2010),9,pp.1625-1638.
- Teamah, M.A., Sorour, M.M., El-Maghlany, W.M., Afifi, A., Numerical simulation of double diffusive laminar mixed convection in shallow inclined cavities with moving lid, Alexandria En-gineering Journal, 52 (2013),3,pp. 227-239.
- Teamah, M.A., El-Maghlany, W.M, Abo Elazm, M.M.,Bakr, A.S., Mixed convection heat transfer in a lid-driven square cavity completely filled with porous material, Int. J. Appl. Eng. Res,10 (2015),pp. 28105-28128.
- Rahman, M. M., Öztop, H. F., Saidur, R., Mekhilef, S., & Al-Salem, K., Unsteady mixed con-vection in a porous media filled lid-driven cavity heated by a semi-circular heaters. Thermal Sci-ence, 19(2015), 5, pp. 1761-1768.
- Pourmahmoud, N., Ghafouri, A., & Mirzaee, I., Numerical comparison of viscosity models on mixed convection in double lid-driven cavity utilized CuO-water nanofluid. Thermal Science, 20(2016), 1, pp. 347-358.
- Raji, A. & Hasnaoui, M., Combined mixed convection and radiation in ventilated cavi-ties. Engineering Computations, 18 (2001), 7, pp. 922-949.
- Bahlaoui, A., et al., Height partition effect on combined mixed convection and surface radia-tion in a vented rectangular cavity. Journal of Applied Fluid Mechanics, 4 (2011), 1, pp. 89-96.
- Bahlaoui, A, et al., Coupling between mixed convection and radiation in an inclined channel locally heated. J Mech Eng, 55 (2004), pp. 45-57.
- Bahlaoui, A, et al., Mixed convection cooling combined with surface radiation in a partitioned rectangular cavity. Energy Conversion and Management, 50 (2009), 3, pp. 626-635
- Raji, A., Hasnaoui, M., Mixed convection heat transfer in a rectangular cavity ventilated and heated from the side. Numerical Heat Transfer, Part A Applications, 33 (1998), 5, pp. 533-548.
- Raji, A., Hasnaoui, M., Corrélations en convection mixte dans des cavités ventilées. Revue générale de thermique, 37 (1998), 10, pp. 874-884.
- Raji, A., Hasnaoui, M., Mixed convection heat transfer in ventilated cavities with opposing and assisting flows. Engineering Computations, 17 (2000), 5, pp. 556-572.
- Omri, A., Nasrallah, S. B., Control volume finite element numerical simulation of mixed con-vection in an air-cooled cavity. Numerical Heat Transfer: Part A: Applications, 36 (1999), 6, pp. 615-637.
- Singh, S., Sharif, M. A. R., Mixed convective cooling of a rectangular cavity with inlet and exit openings on differentially heated side walls. Numerical Heat Transfer: Part A: Applications, 44 (2003), 3, pp. 233-253.
- Kanna, P. R., et al., Numerical Investigation of Mixed Convection Heat Transfer from Block Mounted on a Cavity. Arabian Journal for Science and Engineering, 39 (2014), 12, pp. 9187-9204.
- Fontana, É, et al., Numerical analysis of mixed convection in partially open cavities heated from below. International Journal of Heat and Mass Transfer, 81 (2015), pp. 829-845.
- Stiriba, Y., et al., A numerical study of three-dimensional laminar mixed convection past an open cavity. International Journal of Heat and Mass Transfer, 53 (2010), 21, pp. 4797-4808.
- Moraga, N. O., Lopez, S. E., Numerical simulation of three-dimensional mixed convection in an air-cooled cavity. Numerical Heat Transfer, Part A: Applications, 45 (2004), 8, pp. 811-824.
- Patankar, S.V., Numerical Heat Transfer and Fluid Flow. McGraw-Hill. New York. , USA, 1980