CFD software, or Computational Fluid Dynamics software, is a tool used to simulate and analyze fluid flow, heat transfer, and related phenomena. It helps engineers and scientists visualize how fluids interact with surfaces and objects, making it essential in fields like aerospace, automotive, and civil engineering. By using mathematical models and numerical methods, CFD software can predict how fluids behave under various conditions. This allows for optimization of designs, improving efficiency, and reducing costs in product development. Popular CFD software includes ANSYS Fluent, OpenFOAM, and COMSOL Multiphysics.