EnvirVis13

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https://diglib.eg.org/handle/10.2312/976

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Browsing EnvirVis13 by Subject "I.3.3 [Computer Graphics]"

Now showing 1 - 4 of 4
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    Determining and Visualizing Potential Sources of Floods
    (The Eurographics Association, 2013) Schlegel, S.; Böttinger, M.; Hlawitschka, M.; Scheuermann, G.; O. Kolditz and K. Rink and G. Scheuermann
    In this paper, we visually analyze spatio-temporal patterns of different hydrologic parameters relevant for flooding. On the basis of data from climate simulations with a high resolution regional atmosphere model, several extreme events are selected for different river catchments in Germany. By visually comparing the spatial distribution of the main contributions to the run-off along with their temporal evolution for a time period in the 20th and the 21th century, impacts of climate change on the hydrological cycle can be identified.
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    Rendering Technique of Multi-layered Domain Boundaries and its Application to Fluid Flow in Porous Media Visualizations
    (The Eurographics Association, 2013) Naumov, D.; Bilke, L.; Kolditz, O.; O. Kolditz and K. Rink and G. Scheuermann
    Current visualization techniques for computational fluid dynamics applications are sofisticated and work well in simple geometries. For complex geometries like pore spaces, multiple domain boundaries are obstructing the view and make the studying of fluid flow fields difficult. To overcome these deficiencies we use two-sided materials to render the domain boundaries. Using this technique it is possible to place the camera inside the domain and to have a non-obstructed view on the surrounding flow field without losing spatial reference to the domain boundaries. As a result a larger part of fluid flow visualization is visible. Two-sided material rendering was successfully applied to display still images with Blender Cycles renderer and in a virtual reality environment.
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    Visualisation Strategies for Modelling and Simulation Using Geoscientific Data
    (The Eurographics Association, 2013) Rink, K.; Bilke, L.; O. Kolditz; O. Kolditz and K. Rink and G. Scheuermann
    We present a number of strategies to visualise a wide range of geoscientific data for the modelling of natural phenomena. Input data sets as well as simulation results of hydrological or thermal processes can be assessed and potential problems when incorporating data sets in a model can be detected and resolved. Algorithms for the demonstration of modelling case studies within specialised environments are presented and examples are given for a region in central Germany.
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    Visualizing Saline Intrusion in a Three-Dimensional, Heterogeneous, Coastal Aquifer
    (The Eurographics Association, 2013) Walther, M.; Bilke, L.; Delfs, J.-O.; Graf, T.; Grundmann, J.; Kolditz, O.; Liedl, R.; O. Kolditz and K. Rink and G. Scheuermann
    We visualize remediation scenarios for a coastal aquifer in Oman, where the natural fresh-saltwater interface is negatively affected by groundwater pumping for irrigation. The 3D aquifer is characterized by strong heterogeneities ranging from local to regional scale, which impose visual challenges in the interpretation of large data amounts. This paper addresses the visualization workflow, which helped to ensure correct model setup and successful calibration of a transient model run. The modelling and visualization exercise identified sensitive areas for salinization along the coast and assessed the impact of remediation measures on the groundwater reservoir in space and time. Proper visualization helped to interpret and illustrate the complex results adequately, and to transfer scientific information to stakeholders.