A Computational Study of the Dynamics of the Critical Points in a Simple Fluid Flow
| Autor: | Brøns, Morten, Skajaa, Anders, Skovgaard, Ove |
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| Rok vydání: | 2008 |
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| Druh dokumentu: | Working Paper |
| Popis: | We carry out a computational experiment inspired by a physical experiment by Ouellette and Gollub (PRL 99, 194502 (2007)) where a topological transition of the velocity field in a fluid flow is generated by a grid of magnets. At a well-defined Reynolds number Re the motion of the stagnation points becomes so strong that they may merge and annihilate. Replacing the magnets by a grid of stirrers we obtain the same essential features of the transition, but the resolution allows us to identify two different stages of the process: A range of Re where the annihilation rate of the stagnation points is low but non-zero is followed by a narrow interval where the rate jumps to a high level. Comment: This paper has been withdrawn by the authors, as it has not been accepted for publication |
| Databáze: | arXiv |
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