Thomas Gerhold
German Aerospace Center
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parallel computing | 2001
Petra Aumann; H. Barnewitz; H. Schwarten; Klaus Becker; Ralf Heinrich; Britta Roll; M. Galle; Norbert Kroll; Thomas Gerhold; Dieter Schwamborn; Martin Franke
Abstract As a consequence of the worldwide competition in the aircraft market requirements for the accurate prediction of aerodynamic performance and optimization of configurations have increased very much. More sophisticated wind tunnel as well as high quality CFD techniques have become necessary and essential tools for aircraft industry aerodynamic development groups. This requires an ongoing struggle for efficiency improvements where parallel computing is one of the major issues. This paper considers the MEGAFLOW activities in the area of parallel flow solvers including their application and use in the industrial framework. It describes the parallelization principles for the structured multi-block Navier–Stokes code FLOWer and the unstructured Navier–Stokes code TAU. Principle results for industrial applications are given with respect to efficiency, speed-up, load balancing, etc. Computational examples demonstrate the quality of the solvers for 3D flow over wing/body configurations as well as complete transport aircraft.
Facing the Multicore-Challenge | 2013
Thomas Alrutz; Jan Backhaus; Thomas Brandes; Vanessa End; Thomas Gerhold; Alfred Geiger; Daniel Grünewald; Vincent Heuveline; Jens Jägersküpper; Andreas Knüpfer; Olaf Krzikalla; Edmund Kügeler; Carsten Lojewski; Guy Lonsdale; Ralph Müller-Pfefferkorn; Wolfgang E. Nagel; Lena Oden; Franz-Josef Pfreundt; Mirko Rahn; Michael Sattler; Mareike Schmidtobreick; Annika Schiller; Christian Simmendinger; Thomas Soddemann; Godehard Sutmann; Henning Weber; Jan-Philipp Weiss
At the threshold to exascale computing, limitations of the MPI programming model become more and more pronounced. HPC programmers have to design codes that can run and scale on systems with hundreds of thousands of cores. Setting up accordingly many communication buffers, point-to-point communication links, and using bulk-synchronous communication phases is contradicting scalability in these dimensions. Moreover, the reliability of upcoming systems will worsen.
Archive | 2011
Achim Basermann; Hans-Peter Kersken; Andreas Schreiber; Thomas Gerhold; Jens Jägersküpper; Norbert Kroll; Jan Backhaus; Edmund Kügeler; Thomas Alrutz; Christian Simmendinger; Kim Feldhoff; Olaf Krzikalla; Ralph Müller-Pfefferkorn; Mathias Puetz; Petra Aumann; Olaf Knobloch; Jörg Hunger; Carsten Zscherp
The objective of the German BMBF research project Highly Efficient Implementation of CFD Codes for HPC Many-Core Architectures (HICFD) is to develop new methods and tools for the analysis and optimization of the performance of parallel computational fluid dynamics (CFD) codes on high performance computer systems with many-core processors. In the work packages of the project it is investigated how the performance of parallel CFD codes written in C can be increased by the optimal use of all parallelism levels. On the highest level Message Passing Interface (MPI) is utilized. Furthermore, on the level of the many-core architecture, highly scaling, hybrid OpenMP/MPI methods are implemented. On the level of the processor cores the parallel Single Instruction Multiple Data (SIMD) units provided by modern CPUs are exploited.
ECCOMAS CFD 2006: Proceedings of the European Conference on Computational Fluid Dynamics, Egmond aan Zee, The Netherlands, September 5-8, 2006 | 2006
Dieter Schwamborn; Thomas Gerhold; Ralf Heinrich
CEAS Aeronautical Journal | 2016
Norbert Kroll; Mohammad Abu-Zurayk; Diliana Dimitrov; Thomas Franz; Tanja Führer; Thomas Gerhold; Stefan Görtz; Ralf Heinrich; Caslav Ilic; Jonas Jepsen; Jens Jägersküpper; Martin Kruse; Andreas Krumbein; Stefan Langer; Dishi Liu; René Liepelt; Lars Reimer; Markus Ritter; Axel Schwöppe; Julian Scherer; Frank Spiering; Reik Thormann; Vamshi Togiti; Daniel Vollmer; Jan-Hendrik Wendisch
Archive | 2014
Norbert Kroll; Mohammad Abu-Zurayk; Diliana Dimitrov; Thomas Franz; Tanja Führer; Thomas Gerhold; Stefan Görtz; Ralf Heinrich; Caslav Ilic; Jonas Jepsen; Jens Jägersküpper; Martin Kruse; Andreas Krumbein; Stefan Langer; Dishi Liu; René Liepelt; Lars Reimer; Markus Ritter; Axel Schwöppe; Julian Scherer; Frank Spiering; Reik Thormann; Vamshi Togiti; Daniel Vollmer; Jan-Hendrik Wendisch
Archive | 2012
Lars Reimer; Daniel Vollmer; Gunnar Einarsson; Stefan Görtz; Thomas Gerhold; Ralf Heinrich; Norbert Kroll; Andreas Michler; Markus Ritter; Jens Neumann; Lars-Uwe Hansen
Archive | 2014
Norbert Kroll; Ralf Heinrich; Stefan Görtz; Andreas Krumbein; Thomas Gerhold
Archive | 2011
Thomas Gerhold; Norbert Kroll
Archive | 2009
Thomas Alrutz; Petra Aumann; Achim Basermann; Kim Feldhoff; Thomas Gerhold; Jörg Hunger; Jens Jägersküpper; Hans-Peter Kersken; Olaf Knobloch; Norbert Kroll; Olaf Krzikalla; Edmund Kügeler; Ralph Müller-Pfefferkorn; Mathias Puetz; Andreas Schreiber; Christian Simmendinger; Christian Voigt; Carsten Zscherp