OpenFOAM is an open-source software used for computational fluid dynamics (CFD). It allows users to simulate fluid flow, heat transfer, and other related physical processes. The software is highly customizable, enabling users to modify existing solvers or create new ones to suit specific needs. Developed by OpenCFD Ltd, OpenFOAM is widely used in various industries, including automotive, aerospace, and environmental engineering. Its flexibility and extensive library of solvers make it a popular choice for researchers and engineers looking to analyze complex fluid dynamics problems efficiently.