Laminar Free Convective Heat Transfer In Parabolic Enclosures

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ABSTRACT

The laminar free convective heat transfer characteristics of parabolic enclosures have been investigated using numerical computation and experimental modeling methods. The geometry is a long cavity made up of a parabolic wall bowed over a horizontal wall. Due to symmetry, the analytical model is one half of a two-dimensional cross-section consisting of a hot parabolic upper-wall, a cold horizontal base-wall of width B, and an adiabatic vertical wall of height, H.

Two cases of heat-inputs from the parabolic wall have been considered viz;

Case I; isothermal conditions on hot wall and,

Case II; constant-heat-flux conditions through hot wall.

The base and vertical walls remained isothermal and adiabatic respectively.

This model has practical applications in air conditioning considerations of curved-roof housings and in the designs of more efficient solar energy collectors.

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