Filtern
Dokumenttyp
Sprache
- Englisch (2)
Volltext vorhanden
- nein (2)
Gehört zur Bibliographie
- ja (2)
Schlagworte
- Biomechanik (1)
- Gitter-Boltzmann-Methode (1)
- Grafikprozessor (1)
- Grid Computing (1)
- Hochleistungsrechnen (1)
- Hydromechanik (1)
- Informatik (1)
- Spiel-Engine (1)
- Virtuelle Realität (1)
- Visualisierung (1)
Institut
The ability to perform credible CFD simulations at accelerated speeds has opened up the potential for a new use-mode for CFD as a tool in engineering: the application of CFD for first-order parameter-space exploration, analysis, and design com- munication. When coupled with a suitable real-time rendering and interaction capability for in-situ visualisation and manipulation of 3D results, CFD may be used as part of an interactive design tool in virtual engineering. These steerable applications represent a paradigm shift in the application of CFD for engineering and offer the potential to transform the way CFD is used within the industry. This article presents developments towards a production-ready virtual wind tunnel including presentation of an integrated, interactive modelling and simulation tool for aerodynamic design and analysis built using the Unreal Engine 4 game engine. The virtual wind tunnel application provides a mechanism for integrating virtual reality observation, navigation, visualisation and in-game interaction with a flow field simulated using our own GPU-accelerated CFD library based on the lattice-Boltzmann method. Objects may be imported from CAD or reconstructed using Microsoft Kinect-based 3D scanning. Simulation parameters may be modified at run-time by the user. The flow solver has been validated against experimental data for a representative tur- bulent flow and demonstrates excellent agreement with available data.
Steering and visualization
(2010)
Computational steering is an investigative paradigm whereby the parameters of a running program can be altered according to what is seen in the currently visualized results of the simulation. For certain problems, interactive computation brings specific benefits: parameter sweeps can be completed more efficiently by quickly identifying combinations of input values that yield nonsensical results; ‘what-if’ studies may elucidate a number of related hypotheses without computing all of them from scratch; even simply tracking the development of a computation on-line may allow its early termination (with consequent resource savings) if it turns out its set-up was flawed for some reason. Having first come to prominence in the 1990s, the take-up of steering has accelerated in recent years: high performance computer (HPC) facilites have become more widely available, usage of the Grid is increasing, and visualization is experiencing take-up beyond the walls of the pioneering graphics laboratories that first nurtured it. All these factors combine to expand the range and difficulty of the scientific problems that can be tackled by steering. However, this benefit comes at the cost of increasing hardware and software complexity which itself may defeat further progress. This paper discusses these issues and, in the light of some users’ recent experiences, charts the challenges that still face us.