Surface techniques for vortex visualization

This paper presents powerful surface based techniques for the analysis of complex flow fields resulting from CFD simulations. Emphasis is put on the examination of vortical structures. An improved method for stream surface computation that delivers accurate results in regions of intricate flow is presented, along with a novel method to determine boundary surfaces of vortex cores. A number of surface techniques are presented that aid in understanding the flow behavior displayed by these surfaces. Furthermore, a scheme for phenomenological extraction of vortex core lines using stream surfaces is discussed and its accuracy is compared to one of the most established standard techniques.

[1]  H. Lugt,et al.  Introduction to vortex theory , 1996 .

[2]  Frits H. Post,et al.  Geometric Methods for Vortex Extraction , 1999 .

[3]  Mark Meyer,et al.  Implicit fairing of irregular meshes using diffusion and curvature flow , 1999, SIGGRAPH.

[4]  Xavier Tricoche,et al.  An Efficient Point Location Method for Visualization in Large Unstructured Grids , 2003, VMV.

[5]  Frits H. Post,et al.  Geometric Methods for Vortex Extraction , 1999, VisSym.

[6]  Raghu Machiraju,et al.  A Novel Approach To Vortex Core Region Detection , 2002, VisSym.

[7]  U. Dallmann.  Topological structures of three-dimensional vortex flow separation , 1983 .

[8]  J. V. van Wijk,et al.  Implicit stream surfaces , 1993, Proceedings Visualization '93.

[9]  Jeff P. Hultquist,et al.  Constructing stream surfaces in steady 3D vector fields , 1992, Proceedings Visualization '92.

[10]  S. K. Robinson,et al.  Coherent Motions in the Turbulent Boundary Layer , 1991 .

[11]  Raghu Machiraju,et al.  Geometric verification of swirling features in flow fields , 2002, IEEE Visualization, 2002. VIS 2002..

[12]  Jarke J. van Wijk.  Implicit Stream Surfaces , 1993, IEEE Visualization.

[13]  David Banks,et al.  Image-guided streamline placement , 1996, SIGGRAPH.

[14]  David C. Banks,et al.  A Predictor-Corrector Technique for Visualizing Unsteady Flow , 1995, IEEE Trans. Vis. Comput. Graph..

[15]  Hans Hagen,et al.  A tetrahedra-based stream surface algorithm , 2001, Proceedings Visualization, 2001. VIS '01..

[16]  Hans-Georg Pagendarm,et al.  Detecting vortical phenomena in vector data by medium-scale correlation , 1999, Proceedings Visualization '99 (Cat. No.99CB37067).

[17]  Jarke J. van Wijk.  Rendering Surface Particles , 1992, IEEE Visualization.

[18]  D. Sujudi,et al.  Identification of Swirling Flow in 3-D Vector Fields , 1995 .

[19]  Ronald Peikert,et al.  The "Parallel Vectors" operator-a vector field visualization primitive , 1999, Proceedings Visualization '99 (Cat. No.99CB37067).

[20]  Martin Roth,et al.  Automatic extraction of vortex core lines and other line type features for scientific visualization , 2000 .

[21]  Hans-Peter Seidel,et al.  Interactive multi-resolution modeling on arbitrary meshes , 1998, SIGGRAPH.

[22]  Jinhee Jeong,et al.  On the identification of a vortex , 1995, Journal of Fluid Mechanics.