dorsal/arxiv
View SchemaPattern formation in weakly damped Faraday waves
| Authors | Wenbin Zhang, Jorge Vinals |
|---|---|
| Categories | |
| ArXiv ID | patt-sol/9607006 |
| URL | https://arxiv.org/abs/patt-sol/9607006 |
| DOI | 10.1017/S0022112096004764 |
| Journal | J. Fluid Mech. 336, 301 (1997) |
Abstract
We present a theoretical study of nonlinear pattern formation in parametric surface waves for fluids of low viscosity, and in the limit of large aspect ratio. The analysis is based on a quasi-potential approximation to the equations governing fluid motion, followed by a multiscale asymptotic expansion in the distance away from threshold. Close to onset, the asymptotic expansion yields an amplitude equation which is of gradient form, and allows the explicit calculation of the functional form of the cubic nonlinearities. In particular, we find that three-wave resonant interactions contribute significantly to the nonlinear terms, and therefore are important for pattern selection. Minimization of the associated Lyapunov functional predicts a primary bifurcation to a standing wave pattern of square symmetry for capillary-dominated surface waves, in agreement with experiments. In addition, we find that patterns of hexagonal and quasi-crystalline symmetry can be stabilized in certain mixed capillary-gravity waves, even in this case of single frequency forcing. Quasi-crystalline patterns are predicted in a region of parameters readily accessible experimentally.
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"abstract": "We present a theoretical study of nonlinear pattern formation in parametric\nsurface waves for fluids of low viscosity, and in the limit of large aspect\nratio. The analysis is based on a quasi-potential approximation to the\nequations governing fluid motion, followed by a multiscale asymptotic expansion\nin the distance away from threshold. Close to onset, the asymptotic expansion\nyields an amplitude equation which is of gradient form, and allows the explicit\ncalculation of the functional form of the cubic nonlinearities. In particular,\nwe find that three-wave resonant interactions contribute significantly to the\nnonlinear terms, and therefore are important for pattern selection.\nMinimization of the associated Lyapunov functional predicts a primary\nbifurcation to a standing wave pattern of square symmetry for\ncapillary-dominated surface waves, in agreement with experiments. In addition,\nwe find that patterns of hexagonal and quasi-crystalline symmetry can be\nstabilized in certain mixed capillary-gravity waves, even in this case of\nsingle frequency forcing. Quasi-crystalline patterns are predicted in a region\nof parameters readily accessible experimentally.",
"arxiv_id": "patt-sol/9607006",
"authors": [
"Wenbin Zhang",
"Jorge Vinals"
],
"categories": [
"patt-sol",
"nlin.PS"
],
"doi": "10.1017/S0022112096004764",
"journal_ref": "J. Fluid Mech. 336, 301 (1997)",
"title": "Pattern formation in weakly damped Faraday waves",
"url": "https://arxiv.org/abs/patt-sol/9607006"
},
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