1. Visualization in Scientific Computing (or Scientific Visualization) Multiresolution,...

2. Scientific Computing w use of computers to simulate physical processes or systems: development of mathematical model (equation) development of a numerical algorithm implementation in a computer software numerical simulation representation of the result in a comprehens. form interpretation and validation

3. Example: crash simulation of a car equation for shear stress (deformation)

4. w geometrical model w finite element model (FEM)

5. w resolve the equation for each element of the model w data: geometry (3D coordinates) results: scalar values (stress) vector values (deformation)

6. w our model (8 MB): 289 parts 32.000 nodes 28.000 elements 13 time steps Q: how can we interpret this data?

7. … try to understand the numerical information not a good solution (~400.000 scalar & 400.000 vector values)

8. … computer graphics and animation “we are better at understanding this kind of information”

9. Scientific Visualization w is the use of computer graphics to create visual images that aid in the understanding of complex numerical representation of scientific concepts or results w utilize the pattern-recognition capability of the human visual system

10. * astrophysics (Big bang)

11. * molecular biology

12. * visual arts

13. * computational fluid dynamics

14. * gas model of the sun

15. Problems w unprecedented growth in the amount of data w our capability to manipulate, explore and understand large data sets growth more slowly Possible solutions w multiresolution methods w automatic feature extraction

16. Q: How large is large?

17. Accelerated Strategic Computing Initiative (ASCI) - DOE

18. * 4640 compute nodes * 16/74/20 service/disk/network nodes * 9536 Pentium Pro processors * 2500 square feet footprint * 606 GBytes RAM memory * 1.8 TFlops system peak performance ASCI Red TFLOPS Supercomputer

19. 100 % 10 % 50 % Multiresolution representation * at different levels of detail

20. Feature extraction

21. Questions & Answers