ABSTRACT
Computational fluid dynamics (CFD) is the science or art of solving problems involving fluid flow using computers and numerical techniques. CFD simulations can provide insight into detailed flow behaviour in a system, thus helping the designer to arrive at an optimum design. With the increase of computational power, better solution algorithm and reduced cost of the computer, various aspects of flow field and transport phenomena, which are not amenable to direct analytical and experimental technique, can be studied in greater details by CFD. This chapter is devoted to an overview and basic introduction of various CFD processes. The structure of commercial codes like pre-processor, solver and post-processor, as well as their functions, is discussed. Basic governing equations and different types of discretisation procedures with desirable properties of discretisation are also briefly explored.
