Direct numerical simulation of turbulent flow over dimples - Code optimization for NEC SX-8 plus flow results
Publication date
2008
Document type
Conference paper
Author
Organisational unit
DOI
10.1007/978-3-540-74739-0_21
Scopus ID
2-s2.0-84892220945
ISBN
978-3-540747383
Conference
High Performance Computing in Science and Engineering 2007
Book title
High Performance Computing in Science and Engineering '07 Transactions of the High Performance Computing Center, Stuttgart (HLRS) 2007
First page
303
Last page
318
Part of the university bibliography
✅
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.
Version
Not applicable (or unknown)
Access Right
Metadata only access