Computational fluid dynamics is a branch of fluid mechanics that employs numerical methods and algorithms to simulate and analyze the behavior of fluid flows. It involves discretizing the governing partial differential equations, such as the Navier-Stokes equations, and solving them computationally to predict velocity, pressure, temperature, and other fluid properties under various conditions. This field serves as a critical tool for understanding, predicting, and optimizing complex fluid phenomena across diverse scientific and engineering disciplines where experimental or analytical approaches are challenging.