Title: | Direct numerical simulation of turbulent flow over dimples - Code optimization for NEC SX-8 plus flow results | Authors: | Breuer, Michael Lammers, P. Zeiser, Thomas Hager, Georg Wellein, Gerhard |
Language: | eng | Issue Date: | 2008 | Publisher: | Springer | Document Type: | Conference Object | Page Start: | 303 | Page End: | 318 | Published in (Book): | High Performance Computing in Science and Engineering '07 Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2007 | Publisher Place: | Berlin | Conference: | High Performance Computing in Science and Engineering 2007 | Abstract: | The objective of the project DIMPLE is to study complex turbulent flows over a dimpled surface which is expected to lead to drag reduction compared to a smooth surface. In order to understand the physical mechanism of the flow over an arrangement of shallow dimples, CPU time-consuming direct numerical simulations were carried out using two different grid resolutions and three different configurations. As a first step within this project, the code LESOCC was evaluated and optimized for the new vector machine NEC SX-8. Classical vector systems still combine excellent performance with a well-established optimization approach. On the other hand, clusters based on commodity microprocessors offer comparable peak performance at much lower costs. In the context of the introduction of the NEC SX-8 vector computer series we compare single and parallel performance of a computational fluid dynamics application on the SX-8 and on the SGI Altix architecture demonstrating the potential of the SX-8 for teraflop computing in the area of turbulence research and flow control. Finally, results of the flow predictions over a dimpled surface are presented and compared with the reference case of plane channel flow with smooth walls. © 2008 Springer-Verlag. |
Organization Units (connected with the publication): | Strömungsmechanik | ISBN: | 978-3-540747383 | Publisher DOI: | 10.1007/978-3-540-74739-0_21 |
Appears in Collections: | 3 - Publication references (without fulltext) |
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