Title :
A tetrahedra-based stream surface algorithm
Author :
Scheuermann, Gerik ; Bobach, Tom ; Hagen, Hans ; Mahrous, Karim ; Hamann, Bernd ; Joy, Kenneth I. ; Kollmann, Wolfgang
Author_Institution :
Dept. of Comput. Sci., Kaiserslautern Univ., Germany
Abstract :
This paper presents a new algorithm for the calculation of stream surfaces for tetrahedral grids. It propagates the surface through the tetrahedra, one at a time, calculating the intersections with the tetrahedral faces. The method allows us to incorporate topological information from the cells, e.g. critical points. The calculations are based on barycentric coordinates, since this simplifies the theory and the algorithm. The stream surfaces are ruled surfaces inside each cell, and their construction starts with line segments on the faces. Our method supports the analysis of velocity fields resulting from computational fluid dynamics (CFD) simulations.
Keywords :
computational fluid dynamics; data visualisation; digital simulation; flow simulation; flow visualisation; vectors; barycentric coordinates; computational fluid dynamics simulations; critical points; flow surface; flow visualization; line segments; ruled surfaces; surface propagation; tetrahedra-based stream surface algorithm; tetrahedral face intersections; tetrahedral grids; topological information; unstructured grid; vector field visualization; velocity fields; Analytical models; Computational fluid dynamics; Computational modeling; Error correction; Fluid dynamics; Fluid flow; Interpolation; Piecewise linear techniques; Streaming media; Visualization;
Conference_Titel :
Visualization, 2001. VIS '01. Proceedings
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-7201-8
DOI :
10.1109/VISUAL.2001.964506