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FSSteering: A Distributed Framework for Computational Steering in a Script-based CFD Simulation Environment

Wagner, Christian and Flatken, Markus and Meinel, Michael and Gerndt, Andreas and Hagen, Hans (2010) FSSteering: A Distributed Framework for Computational Steering in a Script-based CFD Simulation Environment. Lehmanns Media, Berlin, Germany. 6th High-End Visualization Workshop, 8-12 December 2010, Obergurgl, Austria. ISBN 978-3-86541-361-1.

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Abstract

In order to get insight into interesting flow phenomena, the traditional work-flow of computational fluid dynamics (CFD) consists of setting up and computing the flow field followed by a consecutive post-processing analysis. Only after this analysis one can identify parameters that may have been set wrongly in a configuration stage. Once these parameters are corrected, another time-consuming loop has to be started. To identify inadequate parameter settings already during the simulation run, online monitoring concepts were introduced. Combined with computational steering methods, parameter values can additionally be adjusted which eventually reduces the number of required iterations to yield satisfactory results. At the German Aerospace Center, a comprehensive framework called FlowSimulator has been developed to offer a generic Python-based interface for the management of CFD simulations. It can easily be enhanced by add-ons. One of these extensions is FSSteering which is described in this paper in more detail. As a computational steering environment, FSSteering provides functionalities essential for interactive visualization and explorative analysis. Besides existing computational steering environments and frameworks, a user-centred and domain-specific view is proposed. Existing functionality can be reused without rewriting simulation code to enable for effective steering in CFD. To be more efficient, components of the architecture are distributed across different resources. Whereas the CFD simulation typically runs on a parallel supercomputer, the visualization is carried out on a high-performance virtual reality system which allows interactive data exploration. The post-processing in between can be performed on the supercomputer or on a separate parallelization cluster. But it is also possible to switch between different existing post-processing toolkits. This is just possible because of the very flexible configuration management of the distributed steering framework. We will demonstrate the steering capabilities and the system flexibility by two current research examples. An outlook for future steps concludes this paper.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:FSSteering: A Distributed Framework for Computational Steering in a Script-based CFD Simulation Environment
Authors:
AuthorsInstitution or Email of Authors
Wagner, ChristianDLR SC-RV
Flatken, MarkusDLR SC-RV
Meinel, MichaelDLR SC-VK
Gerndt, AndreasDLR SC-RV
Hagen, HansTU Kaiserslautern
Date:8 December 2010
Refereed publication:Yes
In ISI Web of Science:No
Page Range:pp. 9-20
Editors:
EditorsEmail
Benger, WernerUNSPECIFIED
Gerndt, AndreasUNSPECIFIED
Su, SimonUNSPECIFIED
Schoor, WolframUNSPECIFIED
Koppitz, MichaelUNSPECIFIED
Kapferer, WolfgangUNSPECIFIED
Bischof, Hans-PeterUNSPECIFIED
Di Perro, MassimoUNSPECIFIED
Publisher:Lehmanns Media, Berlin, Germany
ISBN:978-3-86541-361-1
Status:Published
Keywords:Distributed Post-Processing, Computational Steering
Event Title:6th High-End Visualization Workshop
Event Location:Obergurgl, Austria
Event Type:Workshop
Event Dates:8-12 December 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Braunschweig
Institutes and Institutions:Institut of Simulation and Software Technology
Institut of Simulation and Software Technology > Software für Raumfahrtsysteme und interaktive Visualisierung
Deposited By: Dr.rer.nat. Andreas Gerndt
Deposited On:22 Nov 2010 11:18
Last Modified:28 Feb 2013 16:18

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