Wind tunnel testing is a method used in aerodynamics and aerospace engineering to study the effects of airflow on objects such as aircraft, cars, and buildings. In a wind tunnel, a controlled flow of air is generated and directed over a model or full-scale object to simulate real-world aerodynamic conditions. Researchers use wind tunnel testing to measure forces such as lift, drag, and stability, as well as to optimize the design of vehicles or structures for improved performance and efficiency. Wind tunnel testing can also be used to study turbulent flow, heat transfer, and other complex aerodynamic phenomena.