An operator expansion method for computing nonlinear surface waves on a ferrofluid jet

Guyenne, Philippe and Parau, Emilian I. ORCID: (2016) An operator expansion method for computing nonlinear surface waves on a ferrofluid jet. Journal of Computational Physics, 321. 414–434. ISSN 0021-9991

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We present a new numerical method to simulate the time evolution of axisym- metric nonlinear waves on the surface of a ferrofluid jet. It is based on the reduction of this problem to a lower-dimensional computation involving surface variables alone. To do so, we describe the associated Dirichlet–Neumann op- erator in terms of a Taylor series expansion where each term can be efficiently computed by a pseudo-spectral scheme using the fast Fourier transform. We show detailed numerical tests on the convergence of this operator and, to illus- trate the performance of our method, we simulate the long-time propagation and pairwise collisions of axisymmetric solitary waves. Both depression and elevation waves are examined by varying the magnetic field. Comparisons with weakly nonlinear predictions are also provided.

Item Type: Article
Uncontrolled Keywords: dirichlet–neumann operator,ferrofluid jet,pseudo-spectral method,series expansion,solitary waves
Faculty \ School: Faculty of Science > School of Mathematics
UEA Research Groups: Faculty of Science > Research Groups > Fluid and Solid Mechanics
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Depositing User: Pure Connector
Date Deposited: 01 Jun 2016 12:00
Last Modified: 22 Oct 2022 01:13
DOI: 10.1016/


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