Computational Fluid Dynamics (abbreviated as CFD) is a subject which deals with solution of fluid dynamics and heat transfer problems using numerical methods which can be programmed on computer. Engineers today can make use of CFD tools to simulate fluid flow and heat transfer phenomena in a design and predict the system performance before manufacturing. The present text introduces CFD to beginners in an easy-to-understand manner. Advanced students will also find this book useful. This is an invaluable textbook for postgraduate Mechanical, Aerospace, Metallurgical and Chemical Engineering students. Undergraduate students would also find in it a useful reference for their projects.