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. 2022 Jan 25;29(18):26131–26159. doi: 10.1007/s11356-022-18719-9

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Fig. 4 — Experimental setup. Left panel is a reference, and the right panel is above a steel plate, creating an air channel underneath it. a First setup (natural convection). b Second setup (forced convection) (Káiser and Zamora, 2013)