CFD evaluation of wind catcher geometry and internal partitions for enhanced ventilation in Nizwa, Oman

This study aims to evaluate the effectiveness of wind catchers as a passive cooling strategy in regions with hot climates, where their potential remains largely unexplored. Focusing on a mosque building in Nizwa, Oman, the research investigates the impact of windcatcher geometry and internal partitions on indoor ventilation. The existing case is analyzed, and indoor ventilation conditions are simulated, followed by the generation of various scenarios, including different windcatcher shapes (Square and Rectangular) and various internal partition types (X blades, + blades, and H blades). Each scenario is subjected to CFD analysis. Results show that a Square windcatcher with X+ combination type partitions increase indoor ventilation, raising air velocity from 0.333508 m/s (base case) to 0.693379 m/s (scenario), leading to a 51.9% improvement in indoor ventilation rate. This research suggests valuable insights for architects and designers, advocating for the utilization of windcatcher principles to promote more sustainable architectural practices.