Free Registration until April 1, 2014 University of Texas at Arlington May 14-16, 2014 Principal Lecturer: Chaoqun Liu, Professor & Director, Center of Numerical Simulation and Modeling, Department of Mathematics, University of Texas at Arlington, Arlington, Texas, USA cliu@uta.edu
Table Contents 1. Governing equation and DNS code 2. Orr-Sommerfeld equation and its solution 3. Vortex structure visualization by lambda 2 and vortex filaments 4. Spanwise vortex formation by transfer from shear to rotation 5. Shear layer stability analysis (Shear layer instability is the mother of turbulence) 6. Lambda vortex root formation (Lambda vortex is not a vortex tube, but rotation cores) by the spanwise vortex and 3-D T-S wave which is extremely unstable 7. Ring like vortex formation which is not part of Lambda vortex (There is no such a process that the Lambda vortex self-deforms to hairpin vortex; lambda roots and vortex rings are developed separately by different mechanisms) 8. Role of unstable modes (push up vorticity from the wall, stimulate the transition from shear to rotation, but cannot form vortex by themselves) 9. Mechanism of multiple vortex ring formation (There is not vortex breakdown and reconnection) – all are formed by shear layer instability which is generated by momentum deficit caused by vortex ring ejection 10. U-shaped vortex (Not secondary but tertiary) 11. Large vortex structure (Very stable structure and cannot break down) 12. Sweeps, ejections, positive and negative spikes, and high shear layers in turbulent flow 13. Small length scale generation (Not by vortex breakdown, but all are generated by shear layer instability which is formed by positive and negative spikes no matter how to define “vortex”) 14. Energy transfer paths from larger vortex to smaller vortex (Not by vortex breakdown but by vortex ring sweeps) 15. Flow Chaos (Not only by background noises but mainly by instability of multiple vortex package structure) 16. Richardson eddy cascade revisit (There is no such a cascade) 17. Kolmogorov hypothesis revisit (There is no vortex breakdown and there is no energy passing through vortex breakdown. There is no proof of existence of Kolmogorov small scale) 18. Flow transition and turbulent flow control (Control the shear layers) 19. Intermittence revisit (There is no intermittence in turbulence) 20. Turbulence model revisit (Model the vortex packages and relative motion between packages) Contact Caixia Chen at caixiac@uta.edu if you are interested.
