NUMERICAL INVESTIGATION OF TURBULENT NATURAL CONVECTION IN AN INCLINED SQUARE ENCLOSURE
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Abstract
Two dimensional turbulent natural convection heat transfer and fluid flow inside an air filled
inclined square enclosure differentially heated has been numerically studied. Fully elliptic Navier-
Stockes and energy equations are solved using finite volume method. The problem is simulated for
different angles of inclination ( 0 ≤θ ≤ 180deg. ) and Rayleigh numbers (108 ≤ Ra ≤ 1016 ). The
turbulence k-є model is used to model the effect of turbulence. The wall function approach is used
to model the regions near the walls of the enclosure. The obtained results from this study show that
the rate of heat transfer is increased with the increase of Rayleigh number and decreased with the
increase of angle of inclination( 0 ≤θ ≤ 90deg. ).Also the induced vortices are strongly elongated
with increase of Rayleigh number. The thickness of thermal boundary layer is decreased with the
increase of Ra. The validation of the present code was done by comparing the computed results
with the published ones. The comparison indicated a good agreement
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References
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