ANSYS is a comprehensive engineering simulation software suite used to model, analyze, and predict how products will perform in real-world environments. Its tools enable engineers and designers to simulate a wide range of physical phenomena, including structural mechanics, fluid dynamics, thermodynamics, electromagnetics, and more. In engineering for the built environment, it is primarily used to do structural analysis and modeling fluid dynamics. ANSYS allows for detailed modeling of complex scenarios, enabling users to optimize design parameters, assess durability, and improve efficiency without the need for costly physical prototypes.