PARAMETRIC STUDY OF LAMINAR NATURAL CONVECTION IN GLAZING ENCLOSURE
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Abstract
This work includes a numerical investigation of steady two dimensional laminar natural
convection heat transfer in glazed rectangular enclosure at different tilt angles ranged from (0o
to 90o) for Rayleigh number (103-106), aspect ratios(4,5, and 8),and Prandtl number (0.7). The
study considers the effect of different boundary conditions on the heat transfer within the
enclosure. The continuity equation, Navier-Stokes equations and the energy equation are
solved by developing a numerical model based on finite volume method using SIMPLE
algorithm with hybrid scheme to compute the velocity vectors, temperature, pressure, and
Nusselt No. (local and average). Results show an increase in heat transfer rate with increasing
of Rayleigh number, and for low Rayleigh numbers, the conduction is the dominant heat
transfer mode. At Ra= 103, the mean Nusselt number remains constant around unity for all
cases. The tilt angle has the major effect on the heat transfer for Rayleigh number larger than
104. A comparison of the present results with previously published data is conducted, and good
agreement is seen to indicate the effectiveness and flexibility of the developed numerical
procedure.
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References
Hiroyuki Ozoe, “Natural Circulation in an Inclined Rectangular Channel Heated on One Side and Cooled on the Opposing Side”, International Journal of Heat & Mass Transfer, Vol.17, pp.1209-1217, (1973).
Ivan Catton “Natural Convection Flow In A Finite Rectangular Slot Arbitrarily Oriented With Respect To The Gravity Vector” International Journal of Heat & Mass Transfer, Vol.17, pp.173-184, June (1973).
Mayer B.A and Mitchel J.W., “Natural Convection Heat Transfer in Moderate Aspect Ratio Enclosures”, International Journal of Heat Transfer, Vol. 101, pp.655-659, Nov (1979).
Elsherbiny S.M.; Raithby G.D and Hollands K. G. T., “Heat Transfer by Natural Convection across Vertical and Incline Air Layers ", Transactions of the ASME, Vol. 104, pp. 96-102, (1982).
Patankar, S. V., "Numerical Heat Transfer and Fluid Flow", Hemisphere Publishing Corporation, Taylor & Francis Group, (1980).
Wang.H.; and Hamed M.S., “Flow Mode-Transition Of Natural Convection In Inclined Rectangular Enclosures Subjected To Bidirectional Temperature Gradients”,International Journal of Thermal Science, Vol.45, pp.782-795, (2005).
Huafu Yao., “Studies Of Natural Convection In Enclosures Using The Finite Volume Method”, PhD. Thesis, Mechanical Engineering Department, University of York, Ontario,(Canada) (1999).
Toima, A.M., “An Investigation of Heat Transfer in Glazing Enclosure at Different Orientation Angles”, M.Sc. Thesis, Mechanical Engineering Department, University of Baghdad, (2008).