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Issue No.12 - Dec. (2012 vol.18)
pp: 2149-2158
Harald Obermaier , University of California, Davis
Kenneth I. Joy , University of California, Davis
ABSTRACT
Integral flow surfaces constitute a widely used flow visualization tool due to their capability to convey important flow information such as fluid transport, mixing, and domain segmentation. Current flow surface rendering techniques limit their expressiveness, however, by focusing virtually exclusively on displacement visualization, visually neglecting the more complex notion of deformation such as shearing and stretching that is central to the field of continuum mechanics. To incorporate this information into the flow surface visualization and analysis process, we derive a metric tensor field that encodes local surface deformations as induced by the velocity gradient of the underlying flow field. We demonstrate how properties of the resulting metric tensor field are capable of enhancing present surface visualization and generation methods and develop novel surface querying, sampling, and visualization techniques. The provided results show how this step towards unifying classic flow visualization and more advanced concepts from continuum mechanics enables more detailed and improved flow analysis.
INDEX TERMS
Tensile stress, Surface treatment, Velocity measurement, Shape analysis, Trajectory, Deformation, continuum mechanics, Vector field, integral surfaces, metric tensor, deformation, velocity gradient
CITATION
Harald Obermaier, Kenneth I. Joy, "Derived Metric Tensors for Flow Surface Visualization", IEEE Transactions on Visualization & Computer Graphics, vol.18, no. 12, pp. 2149-2158, Dec. 2012, doi:10.1109/TVCG.2012.211
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