The first day of the course aims at gaining basic skills for the work with OpenFOAM on the supercomputers in Baden-Württemberg. The differences between the work on a serial and on a massive parallel computer with distributed memory are emphasized. The participants will receive written tutorials which allow learning how  to perform parallel computations step by step. In the second day a complex conjugated fluid-flow and heat transfer example will be worked out. More advanced topics like unsteady boundary conditions for turbulent flows as well as visualization of the obtained results with Paraview will be considered.