Towards optimal aerodynamic design of wind catchers: Impact of geometrical characteristics

This paper presents a detailed parametric analysis of the impact geometrical characteristics wind catchers on their flow features to enhance effectiveness cross-ventilation strategies buildings. The following are evaluated in detail: (i) ceiling tilt angle, (ii) radius outer-corner bend, (iii) leeward-side (iv) straight inlet extension length, (v) nozzle-shaped radius, and (vi) inner-corner bend. In addition, using guide vanes bend is systematically investigated. High-resolution coupled (outdoor indoor airflow) 3D steady RANS CFD simulations performed for 40 different catcher geometries. based grid-sensitivity validated by comparing with two wind-tunnel measurements. results show that use extensions can significantly increase airflow rate. maximum about 23%, which achieved length S/D = 1 (D wind-catcher depth). Guide also found effectively improve uniformity inside enhancement go up 29% when implemented combination 0.375. present study support optimal aerodynamic design catchers.