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Finite Amplitudes Helical Waves on the Surface of the Conducting Fluid Earth Core as an Example of the Self-exciting Homopolar Heterogeneous Dynamo : Volume 13, Issue 6 (01/11/2006)

By Glazkov, V. V.

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Book Id: WPLBN0004019793
Format Type: PDF Article :
File Size: Pages 5
Reproduction Date: 2015

Title: Finite Amplitudes Helical Waves on the Surface of the Conducting Fluid Earth Core as an Example of the Self-exciting Homopolar Heterogeneous Dynamo : Volume 13, Issue 6 (01/11/2006)  
Author: Glazkov, V. V.
Volume: Vol. 13, Issue 6
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2006
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Sinkevich, O. A., & Glazkov, V. V. (2006). Finite Amplitudes Helical Waves on the Surface of the Conducting Fluid Earth Core as an Example of the Self-exciting Homopolar Heterogeneous Dynamo : Volume 13, Issue 6 (01/11/2006). Retrieved from http://hawaiilibrary.net/


Description
Description: Moscow Power Engineering Institute, 111 250, Krasnokazarmennaya str, 14, Moscow, Russia. Helical waves of the finite amplitude on a surface of the fluid conducting Earth core are examined for generation of the magnetic field. Estimates are made for the differentially rotating cylindrical conducting fluid body, with the helical surface wave structure on its top. This structure is similar to the self-exciting Faraday-disk homopolar heterogeneous dynamo. Estimations of angular velocity and magnetic field magnitude for a polar vortex on the surface of the Earth's liquid outer core gives reasonable numbers and proves this hypothesis to be of value for further detailed analysis. As magnetic field generation by the helical structure is a surface effect, it is possible to find connection between Earth magnetic field fluctuations and fast relief changes on the iron fluid core – the silicate mantle boundary of the Earth.

Summary
Finite amplitudes helical waves on the surface of the conducting fluid earth core as an example of the self-exciting homopolar heterogeneous dynamo

Excerpt
Aurnou, J., Andreadis, S., Zhu, L., and Olson, P.: Experiments on convection in Earth's core tangent cylinder, Earth Planet. Sci. Lett., 212, 119–134, 2003.; Bullard, E. C.: The Stability of a Homopolar Disc Dynamo, Proc. Camb. Phil. Soc., 51, 744–760, 1955.; Cowling, T. G.: The Magnetic Field of Sunspots, Mon. Not. R. Astr. Soc., 94, 39–48, 1934.; Gailitis, A., Lielausis, O., Platacis, E., Gerbeth, G., and Stefani, F.: The Riga Dynamo Experiment, Surveys in Geophysics, 24, 247–267, 2003.; Glatzmaier, G. A. and Roberts, P. H.: A 3D convective dynamo solution with rotating and finitely conducting inner core and mantle, Phys. Earth Planet Int., 91, 63–75, 1995.; Gregory, N., Stuart, J. T., and Walkker, W. S.: On the stability of three-dimensional boundary layers with application to the flow due to a rotating disk, Phil. Trans. Roy. Soc. Lond., Ser.A, 248, 155–199, 1955.; Hide, R. and Moroz, I. R.: Effects due to induced azimuthal eddy currents in a self-exciting Faraday disk homopolar dynamo with a nonlinear series motor, Physica D, 134, 287–301, 1999.; Moffat, H. K.: Electric Field Generation in Electrically Conducting Fluids, Cambrige University Press, NY, 1978.; Olson, P. and Aurnou, J.: A polar vortex in the Earth's core, Nature, 402, 170–173, 1999.; Parker, E. N.: Cosmical Magnetic Fields: Their Origin and Their Activity, Clarendon Press, Oxford, 1979.; Stevenson, D. J.: Planetary magnetic fields, Earth Planet. Sci. Lett., 208, 1–11, 2003.; Stieglitz, R. and Muller, U.: Experimental Demonstration of a Homogeneous Two-Scale Dynamo, Phys. Fluids, 13, 561–564, 2001.

 

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