High-performance parallel implicit CFD

William D Gropp, Dinesh K Kaushik, David E Keyes, Barry F Smith
2001 Parallel Computing  
Fluid dynamical simulations based on nite discretizations on quasi-static grids scale well in parallel, but execute at a disappointing percentage of per-processor peak oating point operation rates without special attention to layout and access ordering of data. We document both claims from our experience with an unstructured grid CFD code that is typical of the state of the practice at NASA. These basic performance characteristics of PDE-based codes can beunderstood with surprisingly simple
more » ... ls, for which w e quote earlier work, presenting primarily experimental results herein. These performance models and experimental results motivate algorithmic and software practices that lead to improvements in both parallel scalability and pernode performance. This snapshot of ongoing work updates our 1999 Bell Prize-winning simulation on ASCI computers.
doi:10.1016/s0167-8191(00)00075-2 fatcat:boiejxon5vhe5mfh2bumonwhti