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Convected level set method for the numerical simulation of fluid buckling

Identifieur interne : 000092 ( France/Analysis ); précédent : 000091; suivant : 000093

Convected level set method for the numerical simulation of fluid buckling

Auteurs : Laurence Ville [France] ; Luisa Silva [France] ; Thierry Coupez [France]

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Mots-clés :

Abstract

'Fluid buckling' is a phenomenon characterized mainly by the existence of fluid toroidal oscillations during flow. It appears when a high viscosity fluid flows vertically against a flat surface and may occur in industrial applications, as in injection molding of a propergol in complex-shaped cavities. These coiling or folding oscillations appear during the mold filling stage, leading to air entrapment. To understand and to model this free surface flow problem, a convected level set method is proposed. First, a sinus filter is applied to the distance function to get a smooth truncation far from the interface. Second, the reinitialization is embedded in the transport equation model, avoiding it as a separate step during calculation. In order to validate the method, numerical results are presented on classical interface capturing benchmarks. Finally, results are shown on two-dimensional and three-dimensional viscous jet buckling problems.


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Pascal:11-0302599

Le document en format XML

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<term>Injection molding</term>
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<term>Ecoulement surface libre</term>
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<term>Fluide visqueux</term>
<term>Pliage</term>
<term>Remplissage moule</term>
<term>Méthode niveau multiple</term>
<term>Modélisation</term>
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<div type="abstract" xml:lang="en">'Fluid buckling' is a phenomenon characterized mainly by the existence of fluid toroidal oscillations during flow. It appears when a high viscosity fluid flows vertically against a flat surface and may occur in industrial applications, as in injection molding of a propergol in complex-shaped cavities. These coiling or folding oscillations appear during the mold filling stage, leading to air entrapment. To understand and to model this free surface flow problem, a convected level set method is proposed. First, a sinus filter is applied to the distance function to get a smooth truncation far from the interface. Second, the reinitialization is embedded in the transport equation model, avoiding it as a separate step during calculation. In order to validate the method, numerical results are presented on classical interface capturing benchmarks. Finally, results are shown on two-dimensional and three-dimensional viscous jet buckling problems.</div>
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