Abstract
•Three dimensional analyses on entropy generation due to natural convection have been performed for partially open cavity.•It is observed that edge of openings is the most effective parameter on entropy generation.•The highest heat transfer and the entropy generation many cases are observed for the fully opened cavity.
Three-dimensional computational analysis of entropy generation due to natural convection in partially open enclosure has been performed in this work by using finite volume method. A written computer code was developed to solve governing equations of this three-dimensional problem. The study has been performed for different governing parameters such as opening ratio 0. 25≤h≤0.75, center of opening 0.25≤d≤0.75 and Rayleigh number 103 ≤ Ra ≤ 105. It is observed that edge of openings is the most effective parameter on entropy generation and after comparing many cases, both the highest heat transfer and entropy generation were observed for the fully opened cavity.
Figure trajectories for different opening ratios for different Rayleigh numbers [Display omitted] .