Air Flow Consulting
Visualisation of unsteady CFX simulation of a spreading fire in a flat unsing COVISE. The concentration of burnt gases can be examined as well as the temperature. By modelling the whole surrounding house, it can be judged whether the existing emergency exits can be accessed securely while the fire advances.
California Institute for Telecommunications and Information Technology
San Diego, CA, USA
Calit² installed a virtual reality wall driven by COVISE and OpenCOVER. Jürgen Schulze-Döbold and his colleagues have an ongoing project concerning interactive visualisation of proteins from the Protein Data Bank (PDB). They also visualize 3D earthquake locations on a world-wide scale. Currently, they are integrating a method to automatically access the latest measurements from the web. Another field of activity is the development of real-time volume rendering algorithms for virtual environments. The algorithm has recently been integrated with UIC/EVL's SAGE library to drive high-resolution tiled displays. See a more detailed list of projects here.
Mr. Drosdol and his team is using COVISE and OpenCOVER to visualize Buildings, show rooms and exhibition booths in the DC Virtual Reality Center EP/QIC in Sindelfingen. Together with the HLRS, we are working on improving this design process by using tangible interfaces and by integrating simulations.
CoSBi used COVISE for the visualization of volumetric data generated by stochastic biochemical simulations. In particular, biologist find simulations in which many species are free to move in a 3D environment and interact of great interest, but visualization of this kind of multi-dimensional volumetric data is not trivial. We used the ViRVo renderer, OpenCOVER, and a custom-made TabletUI plugin to help define and shape multi-dimensional tranfer function.
The picture shows the visualization in COVISE of an engine simulation (intake stroke at partload) with STAR-CD.
The picture shows the visualization of a climate simulation in a truck cabin. It's a coupled simulation consisting of three parts: Flow simulation with heat transfer and radiation. The flow simulation was performed with STAR-CD on a NEC SX-4 by Daimler-Benz (SFB 374, Rapid Prototyping).
Daimler-Benz Aerospace has been partner on the projects PAGEIN and ADONNIS and is now involved into the projects EFENDA and SPOCK. In Efenda the steps "grid generation", "simulation", "postprocessing and visualization" are integrated into COVISE for efficient access of remote supercomputers and for collaborative working. In SPOCK COVISE is the integration platform for the aerodynamic disciplines "simulation", "wind tunnel test" and "free flight test".
FH Konstanz installed the "Immersive_Room", a “cave”-like immersive virtual reality installation where they are using COVISE for projects in teaching and research in architecture, urban planning simulation, virtual words for humans, learning environments and communication design.
Advanced visualization methods in architecture, simulation coupling, tangible interfaces, application example S21, Virgin Galactic.
With HP and Prof Lang's Group, we are working on getting COVISE running on SVA the platform. On a tiled display visualization array we showed a COVISE application example at SC05 in Seattle. At TechEd 2004 in Amsterdam, we showed a 3D online simulation demo using HP Hardware for the keynote speech of Microsoft's vice president and CTO of EMEA, Jonathan Murray.
The department Transition and Turbulence investigates the laminar-turbulent breakdown of a flat plate boundary layer by Direct Numerical Simulation (DNS) solving the complete incompressible Navier-Stokes equations. The evolving (Lambda)-Vortices - 3D vortical structures within the boundary layer - are identified by a vortex criterion, traced in time and visualized in a virtual reality environment (CUBE) using COVISE.
The long time collaboration with IHS focuses on the areas of interactive simulation and Virtual Reality based techniques for analyzing large scale CFD data mostly from the field of water turbine design and optimization. The simulation code FENFLOSS developed at IHS can be coupled to COVISE to perform online simulations. It is possible to attach and deattach to and from running simulations. IHS has been equipped with a large stereo projection wall complementing the CUBE environment at HLRS. The picture shows automatically generated meshes of wicked gate and runner in a radial turbine.
The laser institute of the University of Stuttgart is cooperating with us in the project SFB374 (Rapid Prototyping) in the field of interactive analysis of laser hardening simulations (DIABLO) and VR based analysis of laser welding processes (HEAT3D, picture).
The IMPETUS project uses COVISE for interactive visualisation of interactions between land surface and rainfall in West Africa. This is a joint work between RRZK, Prof. Lang's Chair of Computer Science and the Institute for Geophysics und Meteorology at the University of Cologne.
The ISW (Institute for Control Engineering of Machine Tools and Manufacturing Units) was a partner in the ProSi project. COVISE is used to visualize digital programs and their different parameters as well as the movement of digitally programmed machine tools. The image shows the path of the tool on the surface of a workpiece augmented with the tool's angle.
The Institute of Technical Biochemistry has an ongoing project regarding the application of virtual reality technology in the area of molecular modeling. The Highly Immersive Molecular Modeling (HIMM) project is aimed on the integration of computer aided molecular modeling tools and virtual reality systems like COVISE.
In our cooperation with the Institute for the Theory of Electrical Engineering, COVISE is used for the visualization of magnetic fields. The image shows the transient magnetic flux lines inside a magnetic gear which is a novel transmission in machine tools that has been simulated for INDEX-Werke GmbH & Co. KG Hahn & Tessky in Esslingen.
The Institute of Engineering and Computational Mechanics uses COVISE to visualize Flexible Multibody Systems. The simulation and animated visualization enable an evaluation of the system behavior for complex systems.
In cooperation with the Interdisciplinary Center for Scientific Computing (IWR) Covise is used to visualize neurons, especially branches of neurons in realistic order like e.g. in the brain of a mouse. It is not only possible to show the geometry of the neurons, but also the neurotransmissions at synapses can be examined. For that, the voltage values of the somata were color-coded over the time. A dataset consisting of 120 neurons and 4.000 time steps was visualized in the CAVE of the HLRS.
The Archaeological Institute and Prof. Lang's Chair of Computer Science at the University of Cologne reconstruct, visualize and study some important buildings from cultural heritage on the present area of the pontifical summer residence in Castel Gandolfo near Rome in Italy. The residence is built on the ruins of the summer residence of the Roman Emperor Domitian (51 - 96), occupying 14 km² (5.4 square miles). The picture shows the 3D reconstruction of the cryptoporticus. Along the sun facing wall on the left hand side, specially ordered windows induce lighting effects in form of light barriers. The guests and applicants had to walk along about three hundred meters and had to cross the light barriers to get to the emperor.
Enhancing Data Analysis of Hemodynamic Flow Simulations with COVISE: Marquette University in Milwaukee, Wisconsin, USA
Researchers at Marquette University’s CVTEC Lab are working to develop efficient techniques for modeling and analyzing patient-specific models of coronary, carotid and cerebral blood vessels. By obtaining Magnetic Resonance Imaging (MRI) data, researchers can construct computerized models of a patient’s blood vessel and perform computer analysis in order to quantify risk factors for aneurysm, stroke, atherosclerosis and other relevant pathologies. By incorporating COVISE into the workflow, researchers gain a deeper understanding of the complex interactions between the vessel geometry, hemodynamic quantities such as velocity and wall sheer stress, as well as disease.
Current projects include: modeling vasculature of children with congenital heart diseases, assessing hemodynamics in coronary vessels pre- and post-stent implantation, designing a mobile VR system optimized for a medical clinic, researching teaching and instruction methods for engineering and technology students by using VR, and cardiovascular stent design optimization using cost functions based on hemodynamic flow analyses.
HLRS and Microsoft are working together in the Microsoft HPC Institutes project. Windows Compute Cluster Server 2003 is used as a platform for high performance computing clusters. The goal of this cooperation is to evaluate this platform as an alternative for HPC clusters. To show its potential and possibilities, we implemented interactive simulations running under Windows Server 2003 Compute Cluster Edition. The image shows Safeco Field Stadium in Seattle where we showed a demo during the 2005 company meeting.
The picture shows a surface grid node enhancement done by a COVISE module.
Molecular dynamics simulations gain increasing impact in materials science and materials design. For this present study of ultra-hard metal-carbide layer systems, nanoindentation experiments were simulated aiming to understand details of the transport of matter during irreversible plastic deformation. From this understanding, the microstructure can be modified to impede the matter transport and thus to make the material even harder. See also Kizler et al. Computational Materials Science 39 (2007) 205-213.
St. Mary's Church (Marienkirche) in Reutlingen was build from 1247 to 1343 and is one of the most distinct Gothic buildings in South-West Germany. The octagonal tower roof consist of a local sandstone and was repaired several times due to lightnings, earthquakes and fires. One of the last activities was the installation of a concrete inner shell in the fifties due to static problems. In the measuring campaign the structural behaviour of the sandstone concrete compound of the roof shell was examined by non-destructive testing with impact echo and radar techniques in three fields of different exposition. The visualisation is a horizontal cut of processed impact echo results (computed frequencies, exposition east) in a certain depth.
World's first 6-wall Cave is running with COVISE and COVER amongst others.
Together with Porsche, we are developing a stick shift ergonomics testbed which uses COVER renderer.
COVISE and COVER are used to visualize the results of crash computations for the Boxster and for analysis of CFD simulations. That can be done in a one-wall VR environment. Porsche uses commercial COVISE for visualization and a research version of COVISE for ongoing projects like the stick shift ergonomics testbed. In the past, Porsche and HLRS worked together in several european funded projects like ESPRIT / COVAS. Porsche tested the applicability of COVISE's collaborative working functionality.
HLRS and RECOM Services are working together in the mathematical modelling of industrial combustion equipment in coal-, oil-, and gas-fired power stations. The visualization of the computational results in the Virtual Reality allows a comprehensive understanding of the complex combustion processes occuring in the combustion chamber of power stations.
HLRS and NEC have a very close cooperation in the Teraflop Workbench project which is enabling sustained Teraflop performance for a wide range of scientific and industrial applications. The particular projects are diverse and range from bioinformatics, atomistic simulation, combustion over fluid-structure interaction, medicine and nanotechnology to structural mechanics and turbomachinery. The movie shows a cross-flow breakdown.
In the past, we presented applications - distributed between NEC SX-4 supercomputer and an SGI ONYX workstation - from varios projects with industrial partners in an virtual reality environment on several exhibitions (HPCN97 in Vienna, Autofact97 in Detroit and SC97 in San Jose).
In 2004, Prof. Dr. Ulrich Lang, the "father of COVISE", accepted a professorship at the University of Cologne, where he also heads the Computing Center. COVISE is developed at two research sites now, Cologne and Stuttgart.
ZAIK/RRZK installed an immersive back-projection display wall in November 2004. A cave will be installed in the near future.
To the left, you see a volume rendered image of a computer simulation conducted by the 1. Physical Institute of two colliding galaxies.
In cooperation with the Institute for Aerospace Engineering, COVISE is used for the visualization of turbulent MHD-flows. The influence of temporally varying magnetic fields on liquid metals is studied by means of numerical simulation. A detailed understanding of such flows is important to control crystal growth and other metallurgic processes in an efficient way. The project is supported by the "Deutsche Forschungsgemeinschaft" in the framework of a collaborative research center (SFB 609 / TP A1).
In the field of astrophysics simulations of accretion disks TAT produces large numbers of 3D particle data, which have to be visualized for proper analysis and interpretation. These simulations might take several days of cpu time for calculation even on a high performance supercomputer. So far, the inspection of the simulation data was only possible after the simulation has finished. For this reason a new data exchange mechanismn was implemented that supports the visualization of data from a running simulation. The advantage of this online visualization is that a better control of the running simulation is possible. A scientist can now detect a failing simulation run earlier and stop it if necessary.
The figure shows the online visualization of the particle data from an accretion disk simulation. With using the collaborative volume renderer spatial distributed scientists can now discuss the visualization results of different simulation steps.