Unified Block Structures - the Basis for Parallelization

In this section we discuss the approach of using unified block structures as the basis for parallelization. For this purpose, we will resume certain aspects already introduced briefly in Section 1.1 and discuss them in more detail. In particular, we will have to regard the considerations which are important from the point of view of the users and the developers of the application codes. Correspondingly, we start the discussion with the requirements for the parallelization of large CFD codes, give a survey on parallelization strategies and describe the parallelization approach used in POPINDA. This approach is essentially based on grid partitioning utilizing the concept of block-structured grids and on message passing to exchange information between adjacent blocks. Finally, we make some remarks on the standardization of the production codes