|Title||Stream volume segmentation of grid-less flow simulation.
(In Book) |
|in||Topological Methods in Data Analysis and Visualization: Theory, Algorithms and Applications (Proc. of TopoInVis 2009)|
Harald Obermaier, Jörg Kuhnert, Martin Hering-Bertram, Hans Hagen |
|Keyword(s)||stream volume; moving least squares; mesh-free; segmentation; topology|
We present a novel algorithm for the geometric extraction of stream volume segmentation for visualization of grid-less flow simula- tions. Our goal is the segmentation of different paths through a mixing tube where the flow is represented by scattered point sets approximated with moving least squares. The key challenges are the watertight con- struction of boundary representations from separatrices. These are ob- tained by integrating and intersecting stream surfaces starting at sep- aration and attachment lines at boundaries of flow obstacles. A major challenge is the robust integration of stream lines at boundaries with no-slip condition such that closed volume segments are obtained. Our re- sults show the segmentation of volumes taking consistent paths through a mixing tube with six partitioning blades. Slicing these volumes provides valuable insight into the quality of the mixing process.