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Afenchenko V. O., Ezerskij A. B. Dislocation’s dynamics in hexagonal lattices arising in Benard-Marangoni convection. Izvestiya VUZ. Applied Nonlinear Dynamics, 2000, vol. 8, iss. 2, pp. 43-56.

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Language: 
Russian
Heading: 
Autowaves. Self-organization
Article type: 
Article
UDC: 
532.529.2

Dislocation’s dynamics in hexagonal lattices arising in Benard-Marangoni convection

Autors: 
Afenchenko Vladimir Olegovich, Institute of Applied Physics of the Russian Academy of Sciences
Ezerskij Aleksandr Borisovich, Institute of Applied Physics of the Russian Academy of Sciences
Abstract: 

It is shown in experiments а! the penta—hepta—defect in а Bénard convective hexagonal lattice arises as a result of the attraction of two dislocations having opposite topological charges and belonging to different modes. It is elucidated that the rapprochement of dislocations occurs along a corridor connecting these topological charges. Inside the corridor large gradients of the field summed of phases of the modes organised into hexagonal structure are registered. It is shown that depending on the initial phase dislocations either attracted to each other or went toward boundaries. Comparison of dislocation’s trajectories in experiment and numerical calculations is done.

Key words: 
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Acknowledgments: 
The work was supported by the RFBR (grant № 99-02-16493), and International Center for Advanced Research Foundation in Nizhny Novgorod, grant №. 99-2-02.
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Received: 
07.12.1999
Accepted: 
04.02.2000
Published: 
25.05.2000
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