The module introduces the fundamental concepts in CFD. Reynolds averaging brings the `closure problem¿ leading to the empirical Turbulence Models. URANS remains the workhorse for engineers though LES will be increasingly important. FVM with an iterative solution technique is most commonly employed in solving the URANS equations. At the end of the module, the students should be able to assess critically the numerical accuracy and physical validity of a solution; have performed an industrially relevant flow system using proprietary software; and be aware of the applications of the technique to model flows involving other physical phenomena, e.g. heat transfer, chemical reactions.