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» Conférences d’après mars 2011 : nouveau site

1786

Journée Visualization of High-Resolution 3D Turbulent Flows

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Ingredients for a Virtual Topology Lab: feature extraction and visualization of flow fields
Tino Weinkauf (ZIB Berlin)

8 juin 2007

We introduce a virtual flow topology lab that combines several algorithms in order to analyze and visualize the topology of vector fields. While we explain the topological features of 2D steady and time-dependent as well as 3D steady vector fields, we present efficient algorithms to capture them.
These include Feature Flow Fields and Saddle Connectors. Due to the strong correlation between the different topological features, a combination of several algorithms often leads to a new technique: as an example, a combination of Feature Flow Fields and Saddle Connectors can be used to find and track closed stream lines in 2D vector fields. Furthermore, we show that most techniques for extracting topological features can be built up from the following three core algorithms:
- finding zeros in a 2D/3D field
- integrating stream objects (streamlines, stream surfaces, etc.)
- intersecting stream objects
Those are the core ingredients for our virtual topology lab, which we implemented in our visualization suite Amira. We give an interactive demo where we analyze the topology of real-life data sets.
Journée d’études enregistrée avec le soutien du GDR Dynamo

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Tino Weinkauf Tino Weinkauf (ZIB Berlin)
Konrad Zuse Institut Berlin (ZIB), Berlin (Germany)