Abstract
This paper represents a numerical study of mixed convection conduction in enclosed two- dimensional square cavity differentially heated. Complex geometries are designed on a vertical partitioned wall, those geometries are applied to building facades aiming to improve the overall energy performance of the building. Our numerical results are based on the resolution of coupled momentum and energy equations using Ansys Fluent. Numerical study has been performed for different values of the Rayleigh number. Triangular geometry element will be considered in the middle wall. Finally, temperature profile and streamlines will be analyzed to examine the influence of this studied shape.
Highlights
Conjugate mixed convection in enclosed cavities differentially heated represents a longstanding challenge that has been widely studied last decades due to its abundant applications in several engineering and natural processes
Mehdi Khatamifar et al [8] examined the effects of partition position and thickness on the unsteady-state conjugate natural convection heat transfer in a differentially heated partitioned enclosure over a wide range of Rayleigh numbers, he showed that when the Rayleigh number is increasing the Nusselt number decrease
In order to validate our model, we have considered a square cavity without the middle wall, and compared the results with the benchmark [10] of natural convection (Table1), using the Average Nusselt number values for laminar Rayleigh
Summary
Conjugate mixed convection in enclosed cavities differentially heated represents a longstanding challenge that has been widely studied last decades due to its abundant applications in several engineering and natural processes. Previous researches on conjugate mixed convection have considered the thickness as potential factor that can impact the steady state behavior of heat transfer Among those studies, Acharya & Tsang [4] studied the impact of the partitioned wall presence in cavities and the inclination of the enclosed cavities, they found that those two parameters change the position of the maximum Nusselt number (Nu). Kahveci [5] investigated numerically the presence of a vertical partition with various finite thickness and different positions, on natural convection inside square cavity in laminar case using polynomial based differential quadrature method. He found that when the position of the wall is more near to the middle, the value of Nu decreases progressively to achieve a constant. Mehdi Khatamifar et al [8] examined the effects of partition position and thickness on the unsteady-state conjugate natural convection heat transfer in a differentially heated partitioned enclosure over a wide range of Rayleigh numbers, he showed that when the Rayleigh number is increasing the Nusselt number decrease
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