Numerical Analyses of the Localized Structures on an Uneven Bottom Associated with the Davey-Stewartson 1 Equations
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概要
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The Davey-Stewartson (DS) equations with a perturbation term are presented by taking a flttidsystem as an example on an uneven bottom. Stability of dromions, solutions of the DS equations with localized structures, against the perturbation is investigated numerically. Dromionsdecay exponentially under an effect of the perturbation, while they travel stably after the effectdisappears. The decay ratio of dromions is found to have a relation to velocities of dromions,The irnportant role played by the mean flow, which acts as an external force to the system,is discussed. These results show that dromions are quite stable as a localized strvucture in twodimensions, and they are expected to be observed in various physical systems such as fluid orplasma systems.
- 社団法人日本物理学会の論文
- 1996-06-15
著者
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YAJIMA Tetsu
Department of Information Science, Faculty of Engineering, Utsunomiya University
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Yajima T
Utsunomiya Univ. Tochigi
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Yajima Tetsu
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
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Nishinari Katsuhiro
Faculty Of Engineering Yamagata University
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