Parallelisation of the CFD Code of a CFD-NWP Coupled System for the Simulation of Atmospheric Flows over Complex Terrain

• Published in: High Performance Computing for Computational Science - VECPAR 2008 pp. 27 - 38
• Main Authors: Castro, Fernando A., Silva Santos, Castro M. P., Palma, José M. L. M.
• Format: Book Chapter
• Language: English
• Published: Berlin, Heidelberg Springer Berlin Heidelberg 2008
• Series: Lecture Notes in Computer Science
• Subjects: Atmospheric flows; computational fluid dynamics; domain decomposition; micro and mesoscale coupling; wind power prediction
• ISBN: 3540928588; 9783540928584
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-540-92859-1_4

The sequential simulation of atmospheric flows over complex terrain using Computational Fluid Dynamics tools (CFD) leads normally to very large time-consuming runs. With the present day processors only the power available using parallel computers is enough to produce a true prediction using CFD tools, i.e. running the code faster than the evolution of the real weather. In the present work, the parallelisation strategy used to produce the parallel version of the VENTOS® CFD code is shown. A sample of the results included in the present abstract is enough to show the code behaviour as a function of the number of sub-domains, both number and direction along which the domain splitting occurs, and their implications on both the iteration number and code parallel efficiency.