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Flow Visualization

Background: 

Vector field Visualization of  Advective-Diffusive Flows

Many flow phenomena like microscopic mixing and Maragoni convection are due to the complex interplay of advective and diffusive transport of concentrations. By decomposing fluxes into a concentration and a velocity based part, we allow for a vector field visualization of advective-diffusive fluxes using integral lines.

GPU-based Visualization of Unsteady Flow Data Sets

Stream, path and streak lines are known to be very useful for the visualization of unsteady flows. Despite their importance in practice, appropriate algorithms suited for contemporary hardware are rare. In particular, the adaptive construction of the different line types is not sufficiently studied.

This work provides a profound representation and discussion of stream, path and streak lines. Two algorithms are proposed for efficiently and accurately generating these lines using modern graphics hardware. Each includes a scheme for adaptive time-stepping. The adaptivity for stream and path lines is achieved through a new processing idea we call selective transform feedback. The adaptivity for streak lines combines adaptive time-stepping and a geometric refinement of the curve itself. The approach is evaluated by applying it to analytically defined and texture-based examples.

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Publications: 


2015

Begutachtete Konferenzbeiträge

[bib] - Hendrik Hochstetter, Maximilian Wurm, Andreas Kolb - Vector Field Visualization of Advective-Diffusive Flows
In Computer Graphics Forum (EuroVis 2015), 34, 2015, pages DOI: 10.1111/cgf.12660 - [pdf]

2009

Artikel in Zeitschriften

[bib] - Nicolas Cuntz, Albert Pritzkau, Andreas Kolb - Time-Adaptive Lines for the Interactive Visualization of Unsteady Flow Data Sets
In Computer Graphics Forum, 28(8), 2009, pages 2165-2175 - [pdf]

2008

Artikel in Zeitschriften

[bib] - Nicolas Cuntz, Andreas Kolb, Robert Strzodka and Daniel Weiskopf - Particle Level Set Advection for the Interactive Visualization of Unsteady 3D Flow
In Computer Graphics Forum (Proc. EuroVis), 27(3), 2008, pages 719-716 - [pdf]

2007

Begutachtete Konferenzbeiträge

[bib] - N. Cuntz, M. Leidl, A. Kolb, C. Rezk-Salama, M. Böttinger - GPU-based Dynamic Flow Visualization for Climate Research Applications
In Proc. Simulation and Visualization, 2007, pages 371-384 - [pdf]

Technische Berichte

[bib] - Nicolas Cuntz, Robert Strzodka, Andreas Kolb - Real-Time Particle Level Sets with Application to Flow Visualization
In Technical Report , Computer Graphics Group, Institute for Vision and Graphics (IVG), University of Siegen, 2007
 - [pdf]