Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Geometry evaluation of a lid-driven cavity insert at different positions
Submission Author:
Flavia Zinani , RS , Brazil
Co-Authors:
Priscila Rodrigues, Cícero Escobar, Flavia Zinani, Luiz Alberto Oliveira Rocha
Presenter: Flavia Zinani
doi://10.26678/ABCM.ENCIT2022.CIT22-0476
Abstract
The present work aims to analyze and optimize the geometry of a fin inserted in the lower surface at three different positions in a lid-driven cavity using the Constructal Design method and exhaustive search. The system is two-dimensional and subjected to mixed, laminar, and steady-state convection. The performance indicator is the dimensionless heat transfer rate (q*). The degrees of freedom investigated were the fin position and ratio between fin height and width (H1/L1). For all simulations, the Reynolds, Richardson, and Prandtl numbers were kept constant, equal to 400, 0.1, and 6.0, respectively. The mass, momentum, and energy conservation equations were solved using the Finite Volume Method. Compared with the case without a fin, the addition of the fin at the best geometric position showed an improvement of 65027%. As a general trend, the insertion of a fin improves the performance of the system. Besides, the fin inserted more to the right of the cavity provides a significant increase in the performance indicator, increasing up to 172.96% compared to the baseline geometry (S = 0.25, H1/L1 = 1.0). Regarding the effect of the H1/L1 ratio inserted at three different positions, the geometric evaluation allows a gain of approximately 124%.
Keywords
Constructal Design, Optimizaton, fins, Driven Cavity
