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奈良女子大学人間文化研究科 博士課程後期2回 梅田早希

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Presentation on theme: "奈良女子大学人間文化研究科 博士課程後期2回 梅田早希"— Presentation transcript:

1 奈良女子大学人間文化研究科 博士課程後期2回 梅田早希
位相的カオスを利用した 流体のかき混ぜ 奈良女子大学人間文化研究科 博士課程後期2回 梅田早希

2 horse shoe mapを利用したmixing device
Scönfeld, F., Hessel, V. and Hofmann, C., An optimised split-and reconbine micro-mixer with uniform ‘chaotioc’ mixing, Lab Chip 4(2000),

3 split-and-recombine (SAR) のmixing の様子

4 Stremler-Chenの実験 Stremler, M., Chen, J., Generating topological chaos in lid-driven cavity flow, PHYSICS OF FLUID 19 (2007), —

5 Kin-Sakajoのcomputer simulation
Kin, E., Sakajo, T., Efficient topological chaos embeded in the blinking vortex system, Chaos 15(2005), —

6 pA type のBSD Kobayashi T. and Umeda, S, Realizing pseudo-Anosov egg beaters with simple mechanisms, Proc. of the Int. Workshop on Knot theory for Sci. Objects, March(2006), , 2007.

7 Thiffeault-FinnのBSD Thiffeault,J.L., Finn, M.D., Topology, Braids, and Mixing in Fluids, Math, Phys. and Eng. Sci. 364 (2006),

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10 hypotrochoid curve

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12 hypotrochoid curve を利用したBSD

13 Example

14 Example

15 対応するbraid

16 0bservation: If it is reducible, lk(   ) = lk( ). for any   : inside tube :outside tube

17 Table of Linking number
1 lk(   ) =    (  ∈{1, 2, 3, 4}) lk(   ) = 0 (    ∈{a, b, c, d})

18 実験

19 Topological mixing with ghost rods
PHYSICAL REVIEW E73 Topological mixing with ghost rods Gouillart, Thiffeault and Finn 1919

20 ghost rods

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23 Gnerating topological chaos in lid-driven cavity flow
PHYSICS OF FLUID 19 Gnerating topological chaos in lid-driven cavity flow Stremler, Chen

24 lid-driven cavity flow


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