Abstract
The variation in thermal entry length (TEL) in a heated liquid film flowing down a vertical plate has been experimentally studied for high Reynolds numbers of the flow. Even at low heat fluxes, zones with a temperature exceeding the initial temperature of the film are formed at a distance of ∼7 mm from the upper edge of the heater in the region between rivulets, which is formed between the crests of developed three-dimensional synchronous waves. In rivulets passing along the crests of these waves, the TEL is greater, but it rapidly decreases with increasing heat flux density.
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Original Russian Text © E.A. Chinnov, 2011, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2011, Vol. 37, No. 16, pp. 71–78.
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Chinnov, E.A. Thermal entry length in falling liquid film. Tech. Phys. Lett. 37, 776–779 (2011). https://doi.org/10.1134/S1063785011080190
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DOI: https://doi.org/10.1134/S1063785011080190