Evaluation of High Performance Fortran for an Industrial Computational Fluid Dynamics Code

The PHAROS project, funded by the European Unions ESPRIT pro- gram for research and development in information te chnology, aimed to assess High Performance Fortran (HPF) as a paradigm for porting large FORTRAN 77 scientific applications to distributed memory archi tectures, in comparison to message-passing programming. The AEROLOG computational fluid dynamic software developed by MATRA was one of these applications that has been ported to HPF. It is devoted to the study of compre ssible fluid flows around complex geometries. This paper describes the port o f the AEROLOG code to HPF based on the decomposition of subdomains. It outlines the parallelization strategy, the changes of the data structures and th e tuning of the boundary con- ditions for the subdomains. Performance results for industrial test cases with different HPF compilers are given and compared with the results of the mes- sage-passing version.