Publication 2011 Issue No. 4 - April Abstract - Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow
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Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow
April 2011 (vol. 17 no. 4)
pp. 412-425
 ASCII Text x Tobias Schafhitzel, Kudret Baysal, Mikael Vaaraniemi, Ulrich Rist, Daniel Weiskopf, "Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow," IEEE Transactions on Visualization and Computer Graphics, vol. 17, no. 4, pp. 412-425, April, 2011.
 BibTex x @article{ 10.1109/TVCG.2010.65,author = {Tobias Schafhitzel and Kudret Baysal and Mikael Vaaraniemi and Ulrich Rist and Daniel Weiskopf},title = {Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow},journal ={IEEE Transactions on Visualization and Computer Graphics},volume = {17},number = {4},issn = {1077-2626},year = {2011},pages = {412-425},doi = {http://doi.ieeecomputersociety.org/10.1109/TVCG.2010.65},publisher = {IEEE Computer Society},address = {Los Alamitos, CA, USA},}
 RefWorks Procite/RefMan/Endnote x TY - JOURJO - IEEE Transactions on Visualization and Computer GraphicsTI - Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D FlowIS - 4SN - 1077-2626SP412EP425EPD - 412-425A1 - Tobias Schafhitzel, A1 - Kudret Baysal, A1 - Mikael Vaaraniemi, A1 - Ulrich Rist, A1 - Daniel Weiskopf, PY - 2011KW - Flow visualizationKW - trackingKW - coherent structuresKW - vortex dynamicsKW - shear layers.VL - 17JA - IEEE Transactions on Visualization and Computer GraphicsER -
Tobias Schafhitzel, Universität Stuttgart, Stuttgart
Kudret Baysal, Universität Stuttgart, Stuttgart
Mikael Vaaraniemi, Universität Stuttgart, Stuttgart
Ulrich Rist, Universität Stuttgart, Stuttgart
Daniel Weiskopf, Universität Stuttgart, Stuttgart
In this paper, we present a visualization and tracking system for coherent structures. For this purpose, we propose to consider shear stress—the stretching and shear of particles inside a flow—in vortex dynamics. Based on a discussion and comparison of recent methods for computing shear stress, we introduce visualization techniques in order to provide a representation of shear layers according to their physical interpretation. This paper contributes a combination of theory in fluid mechanics and the corresponding visualization: 1) shear layer criteria are assessed according to how well they can be combined with common vortex identification criteria; 2) sheets of maximal shear are introduced as an appropriate visual representation of shear layers; 3) a visualization method is described for simultaneous tracking of vortices and shear layers as well as their interaction; and 4) the relevance of shear layers in vortex dynamics is demonstrated by means of several examples. We have implemented these new techniques in an interactive visualization system for time-dependent 3D flow. The system is used by fluid mechanics experts in their research of shear-vortex interaction.

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Index Terms:
Flow visualization, tracking, coherent structures, vortex dynamics, shear layers.
Citation:
Tobias Schafhitzel, Kudret Baysal, Mikael Vaaraniemi, Ulrich Rist, Daniel Weiskopf, "Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow," IEEE Transactions on Visualization and Computer Graphics, vol. 17, no. 4, pp. 412-425, April 2011, doi:10.1109/TVCG.2010.65