The effects of buoyancy on upward-flow laminar convection in the entrance region between inclined parallel plates are studied by a numerical method. Solutions are given for three thermal conditions of parallel plates: lower wall heated and upper wall insulated; vice versa; and both walls heated equally. Results are presented to show how the developing upward-flow and thermal field in the entry region are affected by buoyancy in terms of the various inclination angles of parallel plates. Correlation equations applicable in practice are also developed for the skin-friction coefficient and the local Nusselt number.

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