Current applications of GiD in computational fluid dynamics cover a wide range of external and internal flow problems such as ship hydrodynamics, aerodynamics of buildings and vehicles, analysis of fans, mould filling problems, etc. GiD includes all the necessary facilities for generating structured and non structured meshes in complex geometries, as well as for visualising the flow features of interest such as velocity and pressure contours and line plots, velocity vectors, particle lines, stresses at solid boundaries, etc.