PowerPoint-Präsentation
Numerical Methods for Investigating Mixing
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Field approach
Tracer Method
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2nd : Interpolate velocities within gridcells:
3rd Integrate tracers in Time:
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Active tracers
3rd : Marker chain method:
Comparison between methods:
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Different numerical methods - Conclusion
Mixing in Convection
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Mixing in 2D time-periodic flows: Aref (1984) Blinking vortex flow:
- even simple 2D time-periodic flows can exhibit lagrangian chaos
2D time-dependent flows
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Experiments & Kinematic approach (Solomon&Gollub) :
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Higher Rayleigh number:
3D Convective flows
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Multiple tracers. ..
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Hexagonal patterns:
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Spherical geometry:
Comparison with ABC flows: defined by :
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Conlucsion 3D statonary convection
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Conclusion Stationary convection:
Time-dependent convection:
Movie:
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High Raylaeigh numbers:
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Conclusion time-dep. Convection
More realistic parameters: - varable viscosity The influence of plate motion on the mixing process
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Conclusion time-dep. convection with variable viscosity
Auteur: Yanick Ricard & Joerg Schmalzl
E-mail: vdaniel@lmd.ens.fr
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