TitleVolume Deformations in Grid-Less Flow Simulations. (Article)
inComputer Graphics Forum (Proc. of EuroVis 2009)
Author(s) Harald Obermaier, Martin Hering-Bertram, Jörg Kuhnert, Hans Hagen
Keyword(s)integrated deformation; flow separation; flow segmentation; flow particle deformation
Year 2009
Abstract This paper presents a novel method for the extraction and visualization of volume deformations in grid-less point based flow simulations. Our primary goals are the segmentation of different paths through a mixing device and the visualization of ellipsoidal particle deformations. The main challenges are the numerically efficient processing of deformation tensors and the robust integration of stream- and streaklines at boundaries of the dataset such that closed segments are obtained. Our results show two- and three-dimensional particle deformations as well as the segmentation of volumes in stationary fields and areas in time-dependent datasets taking consistent paths through a mixing device. The main contributions are three-fold: -Robust extraction and combination of 3D separation surfaces in flow fields and analysis of volume deformations. -Integration of boundary geometry into streak-lines based flow segmentation. -Integration and visualization of flow particle deformations along flow lines as accumulation of local velocity gradient tensors.