The CABARET method can be used on structured and unstructured grids. To deal with high-fidelity simulations requiring the use of unstructured grids, a version of the CABARET code has been developed. This is capable of dealing with an arbitrary grid structure and will be the code that is used for this project. At the start of this project, the CABARET code was mainly used on single core desktop systems.
We shall describe the development of a distributed memory version of CABARET for use on the HECToR XT/XE systems and based on an unstructured grid representation for compressible turbulent flows. It is worthwhile noting that relationships between neighbouring cells and partitions are generally more complex to manage here than with a structured grid. The consequence is that data associated with unstructured grid layouts requires a lot of effort so that it can be managed and updated by the methods which determine new values based on other values in their physical proximity.
The original work plan for this project was scheduled as follows:
This work began March 2009 with the end goal being a scalable parallel code which would facilitate much larger simulations than possible with the serial code. By implementing MPI, the data would be located over many distributed processing nodes on HECToR using optimum communication that would enable the application to run simulations at least 100 times larger than previously and with a much faster turn around time.
This report will discuss the development of the CABARET code in relation to:
Phil Ridley 2011-02-01