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CFD simulation of liquid-liquid extraction columns and visualization of eulerian datasets

CFD simulation of liquid-liquid extraction columns and visua...

引用

International Research and Training Group 1131 Workshop on visualization of Large and Unstructured Data Sets: Applications in Geospatial Planning, Modeling and Engineering, VLUDS 2011

作者： Hlawitschka, Mark W. Chen, Fang Bart, Hans-Jörg Hamann, Bernd Department of Separation Science and Technology University of Kaiserslautern Germany Computer Graphics and HCI Group University of Kaiserslautern Germany CS Department Institute for Data Analysis and Visualization University of California Davis United States 2 University of Kaiserslautern Germany

ISBN: (纸本)9783939897460

In this joint work, a complete framework for modeling, simulating and visualizing multiphase fluid flow within an extraction column is presented. We first present a volume-of-fluid simulation, which is able to predict the surface of the droplets during coalescence. However, a fast and efficient model is needed for the simulation of a liquid-liquid extraction column due to the high number of occurring droplets. To simulate the velocity and droplet size in a DN32 extraction column, a coupled computational fluid dynamic-population balance model solver is used. The simulation is analyzed using path-line based visualization techniques. A novel semi-automatic re-seeding technique for droplet path-line integration is proposed. With our technique, path-lines of fluid droplets can be re-initialized after contact with the stirring devices. The droplet breakage is captured, allowing the engineer to improve the design of liquid-liquid columns layout.

关键词： Computational fluid dynamics

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A multi-touch enabled human-transporter metaphor for virtual 3D traveling

A multi-touch enabled human-transporter metaphor for virtual...

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Dimitar Valkov Frank Steinicke Gerd Bruder Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

ISBN: (纸本)9781424468461;9781424468447

In this tech-note we demonstrate how multi-touch hand gestures in combination with foot gestures can be used to perform navigation tasks in interactive 3D environments. Geographic Information Systems (GIS) are well suited as a complex testbed for evaluation of user interfaces based on multi-modal input. Recent developments in the area of interactive surfaces enable the construction of low-cost multi-touch displays and relatively inexpensive sensor technology to detect foot gestures, which allows to explore these input modalities for virtual reality environments. In this tech-note, we describe an intuitive 3D user interface metaphor and corresponding hardware, which combine multi-touch hand and foot gestures for interaction with spatial data.

关键词： Navigation Foot Legged locomotion User interfaces Geographic Information Systems Virtual reality visualization computer graphics computer science System testing

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From game events to team tactics: Visual analysis of dangerous situations in multi-match data

From game events to team tactics: Visual analysis of dangero...

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International Conference on Technology and Innovation in Sports, Health and Wellbeing (TISHW)

作者： Manuel Stein Halldór Janetzko Andreas Lamprecht Daniel Seebacher Tobias Schreck Daniel Keim Michael Grossniklaus Department of Computer and Information Science University of Konstanz Institute for Computer Graphics and Knowledge Visualization Graz University of Technology

ISBN: (纸本)9781509057283

Sport analytics in general and soccer analytics in particular constitute quickly growing markets when it comes to professional analyses and visualizations. From a data analysis research perspective, soccer is a rich source of geospatial and temporal movement data, with high details and a controlled environment. However, soccer movement is complex as its compounds are actions and reactions of two opposing teams with inverse goals. Common analyses performed today are typically oriented towards statistical analysis and considering aggregate measurements. In this work, we propose a set of effective visual-interactive methods for investigating set plays as a first step towards semi-automated analysis of tactic behavior. In our analytic design, we follow the so-called Information-seeking Mantra by Ben Shneiderman by providing overview visualizations, interactive refinements, and detailed analysis views. We take an applied approach in showing case studies that give evidence for the applicability and merits of our proposed techniques.

关键词： Data visualization visualization Technological innovation Games Data analysis Computational modeling Analytical models

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Cloud simulation in virtual environments

Cloud simulation in virtual environments

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IEEE Annual International Symposium Virtual Reality

作者： M. Unbescheiden A. Trembilski Department for Visualization & Virtual Reality Fraunhofer Institute of Computer Graphics Research (IGD) Darmstadt Germany

In this paper, we present a new method of simulating and visualizing smoke and steam clouds in virtual environments (VEs). We use a particle system approach, but reduce the particle numbers to decrease the computation and rendering times. Special care, however is taken for the presentation quality of the clouds. From every viewing point (even within the clouds), the VE user does not have the impression that the clouds are hollow polyhedrons, but rather fuzzy objects.

关键词： Clouds Computational modeling Virtual environment Animation Data visualization Urban planning Fires Layout Virtual reality computer graphics

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Immersive virtual studio for architectural exploration

Immersive virtual studio for architectural exploration

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Gerd Bruder Frank Steinicke Dimitar Valkov Klaus Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

ISBN: (纸本)9781424468461;9781424468447

Architects use a variety of analog and digital tools and media to plan and design constructions. Immersive virtual reality (VR) technologies have shown great potential for architectural design, especially for exploration and review of design proposals. In this work we propose a virtual studio system, which allows architects and clients to use arbitrary real-world tools such as maps or rulers during immersive exploration of virtual 3D models. The user interface allows architects and clients to review designs and compose 3D architectural scenes, combining benefits of mixed-reality environments with immersive head-mounted display setups.

关键词： Virtual reality User interfaces Layout Cameras computer graphics Legged locomotion Laboratories computer displays Three dimensional displays Process design

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Arch-Explore: A natural user interface for immersive architectural walkthroughs

Arch-Explore: A natural user interface for immersive archite...

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Gerd Bruder Frank Steinicke Klaus H. Hinrichs Visualization and Computer Graphics (VisCG) Research Group Department of Computer Science University of Münster Munster Germany

In this paper we propose the Arch-Explore user interface, which supports natural exploration of architectural 3D models at different scales in a real walking virtual reality (VR) environment such as head-mounted display (HMD) or CAVE setups. We discuss in detail how user movements can be transferred to the virtual world to enable walking through virtual indoor environments. To overcome the limited interaction space in small VR laboratory setups, we have implemented redirected walking techniques to support natural exploration of comparably large-scale virtual models. Furthermore, the concept of virtual portals provides a means to cover long distances intuitively within architectural models. We describe the software and hardware setup and discuss benefits of Arch-Explore.

关键词： User interfaces Legged locomotion Virtual reality computer graphics Indoor environments Laboratories Hardware Virtual environment Haptic interfaces Feedback

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Multi-path algorithm for triangle strips

Multi-path algorithm for triangle strips

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computer graphics International

作者： P. Vanecek I. Kolingerova Centre of Computer Graphics and Data Visualization Department of Computer Science and Engineering University of West Bohemia Pilsen Czech Republic

Triangle surface models belong to the most popular type of geometric objects description in computer graphics. Therefore, the problem of fast visualization of this type of data is often solved. One of popular approaches is stripification, i.e., a conversion of triangle surface into strips of triangles. This enables to reduce the rendering time by reduction data size and by avoiding of redundant lighting and transformations computations. In this paper we present a new stripification algorithm for static fully triangulated meshes. Our new algorithm is based on the dual graph of triangulation. The experimental results show that our stripification produces much lower number of triangle strips than other stripification algorithms (except one)

关键词： Strips computer graphics Data visualization Rendering (computer graphics) Costs computer science Data engineering Solid modeling Application software computer aided manufacturing

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Smart 3D visualizations in clinical applications

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3rd International Symposium on Smart graphics, SG 2003

作者： Preim, Bernhard Peitgen, Heinz-Otto Institute for Simulation and Graphics Department for Computer Science Otto-von-Guericke-University of Magdeburg Universitaetsplatz 2 Magdeburg39106 Germany Center for Medical Diagnosic Systems and Visualization Universitaetsallee 29 Bremen28359 Germany

ISBN: (纸本)3540405577

We discuss techniques for the visualization of medical volume data dedicated for their clinical use. We describe the need for rapid dynamic interaction facilities with such visualizations and discuss emphasis techniques in more detail. Another crucial aspect of medical visualization is the integration of 2d and 3d visualizations. In order to organize this discussion, we introduce 6 „Golden"rules for medical visualizations. © Springer-Verlag Berlin Heidelberg 2003.

关键词： visualization

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A model for the visualization exploration process

A model for the visualization exploration process

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VIS 2002, IEEE Visualisation 2002

作者： Jankun-Kelly, T.J. Ma, Kwan-Liu Gertz, Michael Visualization and Graphics Res. Grp. Center for IPIC University of California Davis CA 95616 United States Database and Information Syst. Group Computer Science Department University of California Davis CA 95616 United States

The current state of the art in visualization research places a strong emphasis on different techniques to derive insight from disparate types of data. However, little work has investigated the visualization process itself. The information content of the visualization process-the results, history, and relationships between those results-is addressed by this work. A characterization of the visualization process is discussed, leading to a general model of the visualization exploration process. The model, based upon a new parameter derivation calculus, can be used for automated reporting, analysis, or visualized directly. An XML-based language for expressing visualization sessions using the model is also described. These sessions can then be shared and reused by collaborators. The model, along with the XML representation, provides an effective means to utilize the information within the visualization process to further data exploration.

关键词： visualization

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Implicit Surface Modeling Suitable for Inside/Outside Tests with Radial Basis Functions

Implicit Surface Modeling Suitable for Inside/Outside Tests ...

引用

2007 10th IEEE International Conferences on computer Aided Design and computer graphics(CAD/graphics 2007)

作者： Vaclav Skala Centre of Computer Graphics and Data Visualization Department of Computer Science and EngineeringUniversity of West BohemiaPlzenCzech Republic30614

We describe a method for computing an implicit function that represents a surface by its zero level set,given a set of points scattered over the surface and associated with surface normal *** implicit function is defined as a linear combination of compactly supported radial basis *** method is suitable for testing whether a given point is interior or exterior to the surface,previously only associated with globally supported or globally regularized radial basis *** use a two-level interpolation *** the coarse scale interpolation,we set basis function centers by a grid that covers the enlarged bounding box of the given point set and compute their signed distances to the underlying surface using local quadratic approximations of the nearest surface *** a fitting to the residual errors on the surface points and additional off-surface points is performed with fine scale basis *** final function is the sum of the two intermediate functions and is a good approximation of the signed distance field to the surface in the bounding *** of surface reconstruction and set operations between shapes are provided.

关键词： Implicit Surface Modeling Suitable for Inside/Outside Tests with Radial Basis Functions

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