| Autor: |
Assoul M., El Jaouahiry A., Echchadli M., Aniss S. |
| Jazyk: |
English<br />French |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
MATEC Web of Conferences, Vol 286, p 07010 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2261-236X |
| DOI: |
10.1051/matecconf/201928607010 |
| Popis: |
We study the linear stability of two superposed layers of viscous, immiscible fluids of different densities. The whole system is subject to horizontal quasi-periodic oscillation with two incommensurates frequencies ω1 and ω2. The spectral method and Floquet’s theory combined with Runge-Kutta method are used to solve numericelly the linear problem. We analyse the influence of the frequencies ratioω=ω2ω1$ \omega = {{{\omega _1}} \over {{\omega _2}}} $, on the mariginal stability. The numerical solution shows that the quasi-periodic excitation has a stabilizing or a destabilizing effect on the Kelvin-Helmholtz instability as well as in the parametric resonances depending on the frequency ratio and the amplitudes ratio α=α2α1$ \alpha = {{{\alpha _2}} \over {{\alpha _1}}} $. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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