"Flow field around a surface-mounted cubic building with louver blinds" by Fujian Jiang, Zhengrong Li et al.

Building Simulation: An International Journal

Article Title

Flow field around a surface-mounted cubic building with louver blinds

Authors

Fujian Jiang, School of Mechanical Engineering, Tongji University, Shanghai 200092, China
Zhengrong Li, School of Mechanical Engineering, Tongji University, Shanghai 200092, China
Qun Zhao, College of Architectural and Urban Planning, Tongji University, Shanghai 200092, China
Qiuhua Tao, College of Mechanical Engineering, Jimei University, Xiamen 361021, China
Yanping Yuan, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Shunyao Lu, School of Mechanical Engineering, Tongji University, Shanghai 200092, China

Keywords

flow field, louver blinds, wind-tunnel experiment, computational fluid dynamics, wind pressure

Abstract

Louver blinds are commonly used in building designs to avoid excessive solar radiation in an indoor environment, particularly for buildings with highly glazed facades. However, little attention has been given to their impact on flow field and pressure distribution around a building, which is crucial for predicting convective heat transfer, pollutant dispersion, and indoor ventilation. Therefore, the present study combined a wind-tunnel experiment with computational fluid dynamics simulations to study a wind velocity profile, flow field patterns, and surface pressure around a cubic building with louver blinds. The louver blinds move windward flow separation in an upward direction and extend the recirculation region of a roof; moreover, some subvortices are generated between the two adjacent louver slats. Louver angle φ, installing distance W, and slat width B severely affect the generation of subvortices between slats and a conical vortex on the roof. Subsequently, blinds with different φ, W, and B exhibit different pressure distributions on the windward surface and top surface of a building.