Discretization in general domains

In the foregoing chapters we have restricted ourselves to Cartesian computational grids, in order to avoid unnecessary technicalities in discussing the basic principles of computational fluid dynamics. In the present and in the following tow chapters, we will go into the complications brought about by geometric complexity of the domain in which the flow takes place. These complications are mainly of a technical nature, and no new basic principles will emerge. Nevertheless, for successful computation of flows in general domains, the technicalities involved in computation on general grids must be considered carefully.