This course provides a structured and hands-on introduction to Computational Fluid Dynamics (CFD) using OpenFOAM, a widely adopted open-source simulation platform. Intended for students and researchers, it blends essential CFD theory with extensive practical training in geometry preparation, meshing, case setup, solver usage, and post-processing. Core topics such as incompressible flow, heat transfer, compressible flow, and multiphase simulations are covered through detailed, guided exercises. The course also introduces advanced capabilities including dynamic mesh techniques, solver customization, and parallel computing. By the end of the program, participants will have a strong foundation in OpenFOAM-based CFD workflows, enabling them to independently build, run, and analyze simulations efficiently for a range of engineering applications.