OperaV1, Main, Exploration, bibRecord, 001728

Experimental and numerical results on the fluid flow driven by a traveling magnetic field

Identifieur interne : 001728 ( Main/Exploration ); précédent : 001727; suivant : 001729

Experimental and numerical results on the fluid flow driven by a traveling magnetic field

Auteurs : R. Lantzsch [Allemagne] ; V. Galindo [Allemagne] ; I. Grants [Allemagne] ; C. Zhang [Allemagne] ; O. P Tzold [Allemagne] ; G. Gerbeth [Allemagne] ; M. Stelter [Allemagne]

Source :

Journal of crystal growth [ 0022-0248 ] ; 2007.

RBID : Pascal:07-0365910

Descripteurs français

Pascal (Inist)
- Résultat expérimental, Ecoulement fluide, Champ écoulement, Dépendance temps, Simulation numérique, Gradient vertical, Croissance cristalline, Instabilité, Agitation mécanique, Méthode phase fondue, GaInSn, 8110, 8110F.

English descriptors

KwdEn :
- Crystal growth, Digital simulation, Experimental result, Flow pattern, Fluid flow, Growth from melt, Instability, Stirring, Time dependence, Vertical gradient.

Abstract

A traveling magnetic field (TMF) driven flow and its transition from a laminar to a time-dependent flow is studied by means of ultrasonic Doppler velocimetry and numerical simulations. The experimental setup comprises a cylindrical cavity containing the electrically conducting model fluid GaInSn and a system of six equidistant coils, which are fed by an out-of-phase current to create an up-or downward directed TMF. Hence, a Lorentz force is induced in the melt which leads to meridional flow patterns. For numerical simulations commercial codes (Opera/Fidap) and a spectral code are used. The characteristic parameters of the magnetohydrodynamic model system are chosen close to the conditions used for vertical gradient freeze (VGF) crystal growth. The axisymmetric basic flow and its dependence on the dimensionless shielding parameter S are examined. It is shown that, for S>10, the flow velocity decreases significantly, whereas almost no influence is found for a smaller shielding parameter. The critical Reynolds number for the onset of instability is found in the range of 300-450. Good agreement between experimental results and the numerical simulations is achieved.

Affiliations:

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Le document en format XML

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<series><title level="j" type="main">Journal of crystal growth</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Crystal growth</term>
<term>Digital simulation</term>
<term>Experimental result</term>
<term>Flow pattern</term>
<term>Fluid flow</term>
<term>Growth from melt</term>
<term>Instability</term>
<term>Stirring</term>
<term>Time dependence</term>
<term>Vertical gradient</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Résultat expérimental</term>
<term>Ecoulement fluide</term>
<term>Champ écoulement</term>
<term>Dépendance temps</term>
<term>Simulation numérique</term>
<term>Gradient vertical</term>
<term>Croissance cristalline</term>
<term>Instabilité</term>
<term>Agitation mécanique</term>
<term>Méthode phase fondue</term>
<term>GaInSn</term>
<term>8110</term>
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<front><div type="abstract" xml:lang="en">A traveling magnetic field (TMF) driven flow and its transition from a laminar to a time-dependent flow is studied by means of ultrasonic Doppler velocimetry and numerical simulations. The experimental setup comprises a cylindrical cavity containing the electrically conducting model fluid GaInSn and a system of six equidistant coils, which are fed by an out-of-phase current to create an up-or downward directed TMF. Hence, a Lorentz force is induced in the melt which leads to meridional flow patterns. For numerical simulations commercial codes (Opera/Fidap) and a spectral code are used. The characteristic parameters of the magnetohydrodynamic model system are chosen close to the conditions used for vertical gradient freeze (VGF) crystal growth. The axisymmetric basic flow and its dependence on the dimensionless shielding parameter S are examined. It is shown that, for S>10, the flow velocity decreases significantly, whereas almost no influence is found for a smaller shielding parameter. The critical Reynolds number for the onset of instability is found in the range of 300-450. Good agreement between experimental results and the numerical simulations is achieved.</div>
</front>
</TEI>
<affiliations><list><country><li>Allemagne</li>
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<region><li>District de Dresde</li>
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<tree><country name="Allemagne"><noRegion><name sortKey="Lantzsch, R" sort="Lantzsch, R" uniqKey="Lantzsch R" first="R." last="Lantzsch">R. Lantzsch</name>
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<name sortKey="Galindo, V" sort="Galindo, V" uniqKey="Galindo V" first="V." last="Galindo">V. Galindo</name>
<name sortKey="Gerbeth, G" sort="Gerbeth, G" uniqKey="Gerbeth G" first="G." last="Gerbeth">G. Gerbeth</name>
<name sortKey="Grants, I" sort="Grants, I" uniqKey="Grants I" first="I." last="Grants">I. Grants</name>
<name sortKey="P Tzold, O" sort="P Tzold, O" uniqKey="P Tzold O" first="O." last="P Tzold">O. P Tzold</name>
<name sortKey="Stelter, M" sort="Stelter, M" uniqKey="Stelter M" first="M." last="Stelter">M. Stelter</name>
<name sortKey="Zhang, C" sort="Zhang, C" uniqKey="Zhang C" first="C." last="Zhang">C. Zhang</name>
</country>
</tree>
</affiliations>
</record>

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Experimental and numerical results on the fluid flow driven by a traveling magnetic field

Experimental and numerical results on the fluid flow driven by a traveling magnetic field

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri