\u6570\u7406\u7814\u8ac7\u8a71\u4f1a\u3092\u304a\u77e5\u3089\u305b\u3044\u305f\u3057\u307e\u3059\uff0e\u6765\u8074\u6b53\u8fce\uff0e<\/p>\n
\u3053\u306e\u30bb\u30df\u30ca\u30fc\u306f\uff0c\u5148\u306b\u304a\u77e5\u3089\u305b\u3057\u307e\u3057\u305f\uff12\u6708\uff11\uff12\u65e5\uff08\u706b\uff09\u306e\u30bb\u30df\u30ca\u30fc\u306e\u7fcc\u65e5\u306e
\n\uff12\u6708\uff11\uff13\u65e5\uff08\u6c34\uff09\u306b\u958b\u50ac\u3044\u305f\u3057\u307e\u3059\uff0e\u305d\u306e\u305f\u3081\u3084\u306f\u308a\uff0c\u30bb\u30df\u30ca\u30fc\u306e\u300c\u66dc\u65e5\uff0c\u6642
\n\u9593\uff0c\u5834\u6240\u300d\u304c\u3059\u3079\u3066\u901a\u5e38\u3068\u7570\u306a\u308a\u307e\u3059\uff0e\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\uff0e<\/p>\n
======================================================<\/p>\n
\u6d41\u4f53\u529b\u5b66\u30bb\u30df\u30ca\u30fc \uff12\uff10\uff10\uff18 No. 3<\/p>\n
\u65e5\u6642\uff1a 2\u670813\u65e5\uff08\u6c34\uff0915:00\u304b\u308916:30<\/p>\n
\u5834\u6240\uff1a \u4eac\u90fd\u5927\u5b66\u6570\u7406\u89e3\u6790\u7814\u7a76\u6240\uff11\u968e\uff11\uff11\uff15\u53f7\u5ba4<\/p>\n
\u8b1b\u5e2b\uff1a Dr. Paul Manneville
\n(Laboratoire d’Hydrodynamique, Ecole polytechnique, Palaiseau)<\/p>\n
\u984c\u76ee: Plane Couette flow at the laminar-turbulent transition<\/p>\n
\u6982\u8981\uff1a
\nThough the mechanisms involved in the transition to turbulence in wall
\nflows are now better understood [1], statistical properties of the
\ntransition itself are yet unsatisfactorily assessed. Poiseuille pipe
\nflow (Ppf) and plane Couette flow (pCf), both lacking linear
\ninstability modes, have attracted considerable interest recently [2.6].
\nThese flows become turbulent through the nucleation and growth or
\ndecay of turbulent domains that, on the one hand, can be interpreted
\nwithin the framework of low dimensional dynamical systems theory as
\ntransient chaotic states associated to stochastic repellors. On the
\nother hand, limitations due to finite observation times and\/or system
\nsize may play a role and correlative spatiotemporal processes cannot
\nbe ruled out in the transitional regime. In the pCf case, the problem
\nhas been explored via numerical simulations of a model focusing on the
\nin-plane (x, z) space dependence of a few velocity amplitudes with
\nreduced cross-stream (y) dependence [6]. The model is closer to Navier. Stokes
\nequations than previously considered coupled map reductions and
\nthere is evidence that it is well suited to the low-R transitional
\nrange. After a brief review of experimental results [5], I will
\npresent my most recent findings, discuss them in view of those for Ppf
\n[2,4], and attempt to make a connection with the theory of first order
\nphase transitions [7], as suggested long ago by Y. Pomeau [8].<\/p>\n
\u53c2\u8003\u6587\u732e\uff1a
\n[1] T. Mullin, R. Kerswell, eds., IUTAM Symposium on Laminar-Turbulent
\nTransition and Finite Amplitude Solutions (Springer, 2005). [2] B. Hof et al.,
\nNature 443 (2006) 59. [3] J. Peixinho, T. Mullin, Phys. Rev. Lett. 96 (2006)
\n094501. [4] A.P. Willis, R.R. Kerswell, Phys. Rev. Lett. 98 (2007) 014501. [5]
\nS. Bottin et al., Europhys. Lett. 43 (1998) 171. [6] M. Lagha, P. Manneville,
\nEur. Phys. J. B 58 (2007) 433-447. [7] P. Manneville, “Understanding the
\nsub-critical transition to
\nturbulence in wall flows,” Pramana-Journal of Physics, to appear. [8] Y. Pomeau,
\nPhysica D 23 (1986) 3-11.<\/p>\n
+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+–+—-+–+–+<\/p>\n
\u4e16\u8a71\u4eba\uff1a\u85e4 \u5b9a\u7fa9(\u4eac\u5927)\uff0c\u5c71\u7530 \u9053\u592b(\u4eac\u5927\u6570\u7406\u7814)\uff0c\u677e\u672c \u525b(\u4eac\u5927\u7406)
\n\u30a2\u30c9\u30d0\u30a4\u30b6\u30fc\uff1a\u8239\u8d8a \u6e80\u660e\uff08\u4eac\u5927\u60c5\u5831\u5b66\uff09\u3001\u6c34\u5cf6 \u4e8c\u90ce(\u540c\u5fd7\u793e\u5927\u5de5)\u3001
\n\u4f59\u7530 \u6210\u7537\uff08\u4eac\u5927\u7406\uff09
\n\u9023\u7d61\u5148\uff1ayamada@kurims.kyoto-u.ac.jp
\n==============================================<\/p>\n
\u5c71\u7530\u9053\u592b
\n\u4eac\u90fd\u5927\u5b66\u6570\u7406\u89e3\u6790\u7814\u7a76\u6240
\n\u3012606-8502 \u4eac\u90fd\u5e02\u5de6\u4eac\u533a\u5317\u767d\u5ddd\u8ffd\u5206\u753a
\ntel: 075-753-7221, fax: 075-753-7272
\nemail: yamada@kurims.kyoto-u.ac.jp<\/p>\n
\u623b\u308b [http:\/\/www.kyoryu.scphys.kyoto-u.ac.jp\/semi\/semi2.html]<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6570\u7406\u7814\u8ac7\u8a71\u4f1a\u3092\u304a\u77e5\u3089\u305b\u3044\u305f\u3057\u307e\u3059\uff0e\u6765\u8074\u6b53\u8fce\uff0e \u3053\u306e\u30bb\u30df\u30ca\u30fc\u306f\uff0c\u5148\u306b\u304a\u77e5\u3089\u305b\u3057\u307e\u3057\u305f\uff12\u6708\uff11\uff12\u65e5\uff08\u706b\uff09\u306e\u30bb\u30df\u30ca\u30fc\u306e\u7fcc\u65e5\u306e \uff12\u6708\uff11\uff13\u65e5\uff08\u6c34\uff09\u306b\u958b\u50ac\u3044\u305f\u3057\u307e\u3059\uff0e\u305d\u306e\u305f\u3081\u3084\u306f\u308a\uff0c\u30bb\u30df\u30ca\u30fc\u306e\u300c\u66dc\u65e5\uff0c\u6642 \u9593\uff0c\u5834\u6240\u300d\u304c\u3059\u3079\u3066\u901a\u5e38\u3068\u7570\u306a\u308a […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,25],"tags":[],"class_list":["post-471","post","type-post","status-publish","format-standard","hentry","category-16","category-25"],"_links":{"self":[{"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=\/wp\/v2\/posts\/471","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=471"}],"version-history":[{"count":0,"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=\/wp\/v2\/posts\/471\/revisions"}],"wp:attachment":[{"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=471"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kyoryu.scphys.kyoto-u.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}