Abstract
This paper presents the results of an experimental investigation of natural convection from a uniformly heated, vertical flat plate immersed in mercury. Data were obtained at low Grashof numbers particularly. Temperature profiles about the plate were measured with a copper-constantan thermocouple and the results presented on dimensionless plots. The experimental results deviated from the similarity solution of the boundary layer equations and these deviations are shown to depend on the distance up the plate, the heat flux, and the Nusselt number. A qualitative comparison is made with the predictions of a perturbation analysis. Present experimental data ( Gr ∗ x from 1 to 10 8) were correlated to give a relationship between Nu x and Gr ∗ x and this compared with analytical predictions as well as other correlations ( Gr ∗ x from 10 4 to 10 9). Positive deviation of experimental Nu x from the theoretical value was estimated to be about 20 per cent at Gr ∗ x = 2 × 10 4 and Pr = 0.024.
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