Convective heat transfer of a sphere at low values of the Reynolds number (Re ≤ 65) is analyzed. It is shown that, in the region investigated, the theoretical parameters considerably exceed those obtained experimentally, due to the physically unjustified overestimate of the contribution of forced convection to the total. It is concluded that, for this range, one must set up a separate criterion equation in the form, as a minimum, of a quadratic polynomial in the Reynolds number.
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Translated from Izmeritel’naya Tekhnika, No. 10, pp. 41–46, October, 2012.
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Rumyantsev, A.V., Guskov, K.V. Criterion equations for a sphere in the region of low Reynolds numbers. Meas Tech 55, 1178–1186 (2013). https://doi.org/10.1007/s11018-012-0105-x
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DOI: https://doi.org/10.1007/s11018-012-0105-x