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URN: urn:nbn:de:kobv:517-opus-14370
URL: http://opus.kobv.de/ubp/volltexte/2007/1437/
Scheel, Stefan ;
Seehafer, Norbert
Bifurcation to oscillations in three-dimensional Rayleigh-Bénard convection
Kurzfassung in Englisch
Three-dimensional bouyancy-driven convection in a horizontal fluid layer with stress-free boundary conditions at the top and bottom and periodic boundary conditions in the horizontal directions is investigated by means of numerical simulation and bifurcation-analysis techniques. The aspect ratio is fixed to a value of 2√2 and the Prandtl number to a value of 6.8. Two-dimensional convection rolls are found to be stable up to a Rayleigh number of 17 950, where a Hopf bifurcation leads to traveling waves. These are stable up to a Rayleigh number of 30 000, where a secondary Hopf bifurcation generates modulated traveling waves. We pay particular attention to the symmetries of the solutions and symmetry breaking by the bifurcations.
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PACS - Klassifikation: |
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47.20 ky , 47.20 Bp , 47.54.+r |
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Institut 1: |
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Institut für Physik und Astronomie |
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Institut 2: |
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Interdisziplinäres Zentrum Dynamik komplexer Systeme |
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DDC-Sachgruppe: |
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Physik |
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Dokumentart: |
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c Preprint (Vorabdruck) |
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Schriftenreihe: |
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NLD Preprints |
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Bandnummer: |
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paper 039 |
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Sprache: |
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Englisch |
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Erstellungsjahr: |
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1997 |
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Publikationsdatum: |
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03.07.2007 |