Abstract
Mixed convection flows are commonly observed in various technological and industrial applications, including solar stills that are exposed to wind currents and other weather conditions. Combined free and forced convection flows can significantly improve the productivity of solar still devices, making them of practical interest. In fact, a passive solar desalination system with heat storage material is investigated in six climate zones of Morocco and presented by six cities namely: Tangier, Rabat, Ifran, Marrakech, Meknes and Errachidia. This study aims to analyze the effect of mixed convection on the inclined surface of solar desalination systems. Thus, a transient Computational fluid dynamics (CFD) model is developed and investigated under the instantaneous climatic data of the different cities aforementioned. The results indicate that forced convection dominated heat transfer during broad daylight, with the Nusselt number increasing as the Reynolds number increased. Overall, the productivity in Tangier city was found to be significantly higher than that of Rabat, Meknes, Marrakech, Ifran, and Errachidia city, with increases of 45.02%, 50.48%, 23.48%, 83.31%, and 24.89%, respectively.
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