Katalysatorvermehrung durch Molekelteilung

Krause, Alfons; Weimann, Thomas

doi:10.1007/bf01167156

Cited by 4 publications

(4 citation statements)

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“…Primarily STEENBECK, KRAUSE and RAIXER (1966) as well as KRAUSE (1967) had determined the coefficients a1 ... h. These calculations have been repeated with some more generality by KRAUSE and RADLER (1971). The authors obtained their results for treating wealc turbulence and slow rotation.…”

Section: Introductionmentioning

confidence: 99%

On the α‐effect for slow and fast rotation

Rüdiger

1978

Astron Nachr

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This paper deals with the influence of global rotation on a special inhomogeneous field of incompressible turbulence. All its deviations from homogeneity and isotropy may be described only by a constant gradient of turbulence intensity. Using a FOURIER representation we are able to detcrmine the a-effect for any given rotational rates and material constants. I n the case of slow rotation our expressions show a strong similarity with those of other authors. Increasing angular velocities do notas is to be assumed a t first sightsuppress the production of mean electromotive force caused by turbulence. They rather lead to a two-dimensionality of this e.m.f. with respect to the axis of rotation. It scerns, thereforc, that very fast rotation can not completely delete the dynamo instability.Es wird der EinfluD der Rotation auf ein gewisses inhomogenes Turbulenzfeld untersucht, dessen Eigenart in der Existenz eines konstanten Gradienten der Turbulenzintensitat besteht. Unter Verwendung eines FouRiERkalkbls kann man das Verhalten des a-Effektes (bei Anwesenheit eines konstanten Magnetfeldes) fur beliebig schnelle Rotation sowie fur beliebige Viskositat und Leitfahigkeit des Mediums bestimmen. Die Ergebnisse fur langsame Rotation entsprechen im wesentlichen den bereits bekannten. Uberraschenderweise ergibt sich fur schnelle Rotation nicht die erwartete Verkleinerung des a-Effektes : Wiihrend wohl einige der Komponenten des a-Tensors verschwinden, wachsen andere auf die im letzten Abschnitt der Arbeit angegebenen Betrage. Fur Q + 00 resultiert auf diese Weise eine Zweidimensionalitat des a-Effektes bezfiglich der Rotationsachse, so daO eine vollstandige Unterdrackung des Dynamomechanismus fur schnell rotierende I

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Section: Introductionmentioning

confidence: 99%

On the α‐effect for slow and fast rotation

Rüdiger

1978

Astron Nachr

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“…Sporer's law of the equatorial migration of the zone of activity was satisfied by the gradual equatorial drift of the concentrated toroidal magnetic field by meridional circulation. In contrast to this model, Krause (1967) and Leighton (1969) have assumed a differential rotation increasing with depth.…”

Section: Basic Concept Of the Modelmentioning

confidence: 99%

“…The initial state of Krause's model (Krause, 1967) was characterized by a pre vailing dipole-like magnetic field which cut deeply into the bottom of the convec tion zone contrary to the shallow submergence assumed by Babcock (1961). Also, as stated above, it was assumed that the core rotates faster than the outer surface in his model.…”

Section: Basic Concept Of the Modelmentioning

confidence: 99%

“…Apart from these studies, in a series of papers, Krause (1967) and his collaborators have developed a model of the solar cycle, emphasizing the effect of hydromagnetic turbulence resulting from the subphotospheric convection. Their model utilized an induced quadrupole type magnetic field first developed near the surface which migrates towards the equator to account for Sporer's law of zone of activities and towards the interior to achieve the polarity reversal of initial dipole-like polar magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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