SUMMARY

The numerical solution of partial differential equations (PDEs) on unstructured grids using parallel computers leads to an increase in software complexity of several orders of magnitude when compared to a sequential, structured mesh code. Consequently, the design of simulation software with respect to code reuse over problem domains is of great importance. In this paper we review the steps of the PDE solution process with respect to parallel computing and discuss the modular structure of the UG software toolbox. The high–level object–oriented design of the numerical algorithms is shown in some detail to give the reader an impression how new components can be incorporated into the UG framework