
This Article  
 
Share  
Bibliographic References  
Add to:  
Digg Furl Spurl Blink Simpy Del.icio.us Y!MyWeb  
Search  
 
ASCII Text  x  
David N. Kenwright, Chris Henze, Creon Levit, "Feature Extraction of Separation and Attachment Lines *," IEEE Transactions on Visualization and Computer Graphics, vol. 5, no. 2, pp. 135144, AprilJune, 1999.  
BibTex  x  
@article{ 10.1109/2945.773805, author = {David N. Kenwright and Chris Henze and Creon Levit}, title = {Feature Extraction of Separation and Attachment Lines *}, journal ={IEEE Transactions on Visualization and Computer Graphics}, volume = {5}, number = {2}, issn = {10772626}, year = {1999}, pages = {135144}, doi = {http://doi.ieeecomputersociety.org/10.1109/2945.773805}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, }  
RefWorks Procite/RefMan/Endnote  x  
TY  JOUR JO  IEEE Transactions on Visualization and Computer Graphics TI  Feature Extraction of Separation and Attachment Lines * IS  2 SN  10772626 SP135 EP144 EPD  135144 A1  David N. Kenwright, A1  Chris Henze, A1  Creon Levit, PY  1999 KW  Vector field visualization KW  vector field topology KW  flow visualization KW  feature detection KW  flow separation KW  separation line. VL  5 JA  IEEE Transactions on Visualization and Computer Graphics ER   
Abstract—Separation and attachment lines are topologically significant curves that exist on 2D surfaces in 3D vector fields. Two algorithms are presented, one pointbased and one elementbased, that extract separation and attachment lines using eigenvalue analysis of a locally linear function. Unlike prior techniques based on piecewise numerical integration, these algorithms use robust analytical tests that can be applied independently to any point in a vector field. The feature extraction is fully automatic and suited to the analysis of largescale numerical simulations. The strengths and weaknesses of the two algorithms are evaluated using analytic vector fields and also results from computational fluid dynamics (CFD) simulations. We show that both algorithms detect open separation lines–a type of separation that is not captured by conventional vector field topology algorithms.
[1] R.F.W. Bader, Atoms in Molecules–A Quantum Theory. Oxford, U.K.: Oxford Univ. Press, 1990.
[2] F. Brauer and J.A. Nohel, Qualitative Theory of Ordinary Differential Equations. W.A. Benjamin, Inc., pp. 3395, 1969.
[3] B. Cabral and L.C. Leedom, "Imaging Vector Fields Using Line Integral Convolution," Computer Graphics (SIGGRAPH '93 Proc.), pp. 263272, 1993.
[4] N.M. Chaderjian and L.B. Schiff, "NavierStokes Analysis of a Delta Wing in Static and Dynamic Roll," AIAA951868, AIAA Ann. CFD Meeting 1995.
[5] G.T. Chapman, "Topological Classification of Flow Separation on ThreeDimensional Bodies," AIAA860485, AIAA 24th Aerospace Sciences Meeting, Reno, Nev. 1986.
[6] M.S. Chong, A.E. Perry, and B.J. Cantwell, "A General Classification of ThreeDimensional Flow Fields," Physical Fluids A., vol. 2 pp. 765777, 1990.
[7] M.S. Chong and A.E. Perry, "Synthesis of Two and ThreeDimensional Separation Bubbles," Proc. Ninth Australasian Fluid Mechanics Conf., pp. 3538, Auckland, New Zealand, Dec. 1986.
[8] U. Dallman, "Topological Structures of ThreeDimensional Vortex Flow Separation," AIAA831935 Proc. AIAA 16th Fluid and Plasma Dynamics Conf., 1983.
[9] W.C. de Leuuw, H.G. Pagendarm, F.H. Post, and B. Walter, "Visual Simulation of Experimental OilFlow Visualization by Spot Noise Images from Numerical Simulation," Visualization in Scientific Computing '95, pp. 135148, Wien, SpringerVerlag, 1995.
[10] L. Forssell, “Visualizing Flow over Curvilinear Grid Surfaces Using Line Integral Convolution,” Proc. IEEE Visualization '94, pp. 240246, 1994.
[11] A. Globus, C. Levit, and T. Lasinski, "A Tool for Visualizing the Topology of ThreeDimensional Vector Fields," Proc. IEEE Visualization '91, pp. 3340, 1991.
[12] J. Helman and L. Hesselink,“Surface representation of two and threedimensional fluid flow topology,” Proc. Visualization’90, IEEE Computer Society, San Francisco, 1990.
[13] C. Levit, Conf. Scientific Applications of the Connection Machine, NASA Ames Research Center, Moffett Field, Calif., Sept. 1989.
[14] D.N. Kenwright, "Automatic Detection of Open and Closed Separation and Attachment Lines," Proc. IEEE Visualization '98, pp. 151158, 1998.
[15] M.J. Lighthill, "Attachment and Separation in ThreeDimensional Flow," Laminar Boundary Layers, L. Rosenhead II, ed., vol. 2.6, pp. 7282, Oxford Univ. Press, 1963.
[16] W. Merzkirch, Flow Visualization. New York: Academic Press, 1974.
[17] H.G. Pagendarm and B. Walter, "Feature Detection from Vector Quantities in a Numerically Simulated Hypersonic Flow Field in Combination with Experimental Flow Visualization," Proc. Visualization '94, pp. 117123, 1994.
[18] R.L. Panton, Incompressible Flow. John Wiley&Sons, 1984.
[19] H. Poincare, Oeuvres de Henri Poincare, Tome 1. Paris: GautheirVillars, 1928.
[20] G. Scheuermann, H. Hagen, H. Kruger, M. Menzel, and A. Rockwood, Visualization of HigherOrder Singularities in Vector Field Proc. Visualization '97, pp. 6774, Oct. 1997.
[21] H.W. Shen and D.L. Kao, “Uflic: A Line Integral Convolution Algorithm for Visualizing Unsteady Flows,” Proc. Visualization '97, pp. 317322, 1997.
[22] M. Tobak and D.J. Peake, "Topology of ThreeDimensional Separated Flows," Ann. Review of Fluid Mechanics, vol. 14, pp. 6185, 1982.
[23] J.J. van Wijk, “Spot NoiseTexture Synthesis for Data Visualization,” Computer Graphics (SIGGRAPH '91 Proc.), T.W. Sederberg, ed., vol. 25, pp. 309318, July 1991.
[24] K.C. Wang, "Separation Patterns of a Boundary Layer Over an Inclined Body," AIAA J., vol. 10, no. 8, pp. 1,0441,050, 1972.
[25] K.C. Wang, H.C. Zhou, C.H. Hu, and S. Harrington, "ThreeDimensional Separated Flow Structure Over Prolate Spheroids," Proc. R. Soc. London, A 421, pp. 7390, 1990.
[26] J.Z. Wu, J.W. Gu, and J.M. Wu, "Steady ThreeDimensional Fluid Particle Separation from Arbitrary Smooth Surface and Formation of Free Vortex Layers," AIAA872348, AIAA Ann. CFD Meeting, 1987.
[27] H.X. Zhang, Chinese J. of Aerodynamics, no. 4,Beijing, Peoples Republic of China, Dec. 1985.
[28] D. Zwillinger, Handbook of Differential Equations, second ed. Academic Press, pp. 360363, 1957.