Full metadata record
DC Field | Value | Language |
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dc.creator | Miranda, M.A. (Montserrat A.) | - |
dc.creator | Burguete-Mas, F.J. (Francisco Javier) | - |
dc.date.accessioned | 2010-02-22T11:01:22Z | - |
dc.date.available | 2010-02-22T11:01:22Z | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Miranda, M. A. & Burguete, J. 'Subcritical instabilities in a convective fluid layer under a quasi-one-dimensional heating' Phys. Rev. E, 2008, 78, 046305 | es_ES |
dc.identifier.uri | https://hdl.handle.net/10171/6177 | - |
dc.description.abstract | The study and characterization of the diversity of spatiotemporal patterns generated when a rectangular layer of fluid is locally heated beneath its free surface is presented. We focus on the instability of a stationary cellular pattern of wave number ks which undergoes a globally subcritical transition to traveling waves by paritybreaking symmetry. The experimental results show how the emerging traveling mode 2ks /3 switches on a resonant triad ks ,ks /2,2ks /3 within the cellular pattern yielding a “mixed” pattern. The nature of this transition is described quantitatively in terms of the evolution of the fundamental modes by complex demodulation techniques. The Bénard-Marangoni convection accounts for the different dynamics depending on the depth of the fluid layer and on the vertical temperature difference. The existence of a hysteresis cycle has been evaluated quantitatively. When the bifurcation to traveling waves is measured in the vicinity of the codimension-2 bifurcation point, we measure a decrease of the subcritical interval in which the traveling mode becomes unstable. From the traveling wave state the system undergoes a global secondary bifurcation to an alternating pattern which doubles the wavelength ks /2 of the primary cellular pattern; this result compares well with theoretical predictions P. Coullet and G. Iooss, Phys. Rev. Lett. 64, 866 1990 . In this cascade of bifurcations towards a defect dynamics, bistability due to the subcritical behavior of our system is the reason for the coexistence of two different modulated patterns connected by a front. These fronts are stationary for a finite interval of the control parameters. | es_ES |
dc.language.iso | eng | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.title | Subcritical instabilities in a convective fluid layer under a quasi-one-dimensional heating. | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
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