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Evaluation of Parallel Performance of an Unstructured CFD Code on PC–Clusters
Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
2005 (English)In: Journal of Aerospace Computing, Information, and Communication, ISSN 1542-9423, Vol. 2, no 1, 109–119- p.Article in journal (Refereed) Published
Abstract [en]

This paper presents an evaluation of parallel performance of a computational fluiddynamics solver on PC-clusters. The solver uses unstructured grids and is parallelized bydomain decomposition using MPI as the communication library. The influence of nodeconfiguration and type of cluster network on the parallel performance is investigated fortypical applications from an aerospace design environment. The high performance networkbecomes significant when the system scales up. More important is the node configurationwhere memory bandwidth saturation limits the performance on dual nodes.

Place, publisher, year, edition, pages
2005. Vol. 2, no 1, 109–119- p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-13839OAI: diva2:21804
Available from: 2006-05-05 Created: 2006-05-05
In thesis
1. Application of Parallel Computers to Enhance the Flow Modelling Capability in Aircraft Design
Open this publication in new window or tab >>Application of Parallel Computers to Enhance the Flow Modelling Capability in Aircraft Design
2006 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The development process for new aircraft configurations needs to be more efficient in terms of performance, cost and time to market. The potential to influence these factors is highest in early design phases. Thus, high confidence must be established in the product earlier than today. To accomplish this, the concept of virtual product development needs to be established. This implies having a mathematical representation of the product and its associated properties and functions, often obtained through numerical simulations. Building confidence in the product early in the development process through simulations postpones expensive testing and verification to later development stages when the design is more mature.

To use this in aerodynamic design will mean introducing more advanced physical modelling of the flow as well as significantly reducing the turn around time for flow solutions.

This work describes the benefit of using parallel computers for flow simulations in the aircraft design process. Reduced turn around time for flow simulations is a prerequisite for non-linear flow modelling in early design stages and a condition for introducing high-end turbulence models and unsteady simulations in later stages of the aircraft design process. The outcome also demonstrates the importance of bridging the gap between the research community and industrial applications.

The computer platforms are very important to reduce the turn around time for flow simulations. With the recent popularity of Linux–clusters it is now possible to design cost efficient systems for a specific application. Two flow solvers are investigated for parallel

performance on various clusters. Hardware and software factors influencing the efficiency are analyzed and recommendations are made for cost efficiency and peak performance.

Place, publisher, year, edition, pages
Institutionen för konstruktions- och produktionsteknik, 2006. 39 p.
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1246
flow modelling, parallel computer, parallel efficiency, turbulence modelling, aircraft design, CFD
National Category
Fluid Mechanics and Acoustics
urn:nbn:se:liu:diva-6398 (URN)91-85523-82-8 (ISBN)
2006-06-15, Maskinkonstruktions seminarierum (MASS), Ingång 17, Hus A, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Report code: LiU-TEK-LIC-2006:27.Available from: 2006-05-05 Created: 2006-05-05 Last updated: 2009-06-04

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Sillén, Mattias
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