LeHavreV1, France, Analysis, bibRecord, 000161

Nodal analysis of nonlinear behavior of the instability at a fluid interface.

Identifieur interne : 000161 ( France/Analysis ); précédent : 000160; suivant : 000162

Nodal analysis of nonlinear behavior of the instability at a fluid interface.

Auteurs : M-C Renoult [France] ; C. Rosenblatt [France] ; P. Carles [France]

Source :

Physical review letters [ 1079-7114 ] ; 2015.

RBID : pubmed:25839277

Abstract

In interface instabilities, deformations first grow exponentially, then enter a nonlinear regime affecting amplitude and symmetry. Most extant studies have focused on amplitude alone. Here, we study a 2D Rayleigh-Taylor instability for an initial sinusoidal deformation, analyzing its amplitude and asymmetry over time. For the latter, we define a metric based on the zero crossings of the interface. We develop a weakly nonlinear model and compare it to experimental data. It shows that our asymmetry metric complements the amplitude for an improved description of the instabilities' nonlinear phases.

DOI: 10.1103/PhysRevLett.114.114503
PubMed: 25839277

Affiliations:

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pubmed:25839277

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<front><div type="abstract" xml:lang="en">In interface instabilities, deformations first grow exponentially, then enter a nonlinear regime affecting amplitude and symmetry. Most extant studies have focused on amplitude alone. Here, we study a 2D Rayleigh-Taylor instability for an initial sinusoidal deformation, analyzing its amplitude and asymmetry over time. For the latter, we define a metric based on the zero crossings of the interface. We develop a weakly nonlinear model and compare it to experimental data. It shows that our asymmetry metric complements the amplitude for an improved description of the instabilities' nonlinear phases.</div>
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Nodal analysis of nonlinear behavior of the instability at a fluid interface.

Nodal analysis of nonlinear behavior of the instability at a fluid interface.

Source :

Abstract

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Le document en format XML

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