Abstract
The Riga dynamo experiment is an attempt to show the self-excitation of a magnetic field in an electrically conducting fluid. Due to the absence of any scale separation effects, the precise shape of the velocity profile has a strong influence on the values of the critical magnetic Reynolds numbers (Rm). Several numerical codes have been developed and used for the determination of these critical Rm for arbitrary velocity profiles. Helicity maximizing profiles are shown to provide smaller critical Rm than the solid body rotation flow. We outline how the velocity profiles have been optimized in an iterative process including flow measurements, constructive improvements and numerical calculations.
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© 1999 Springer Science+Business Media Dordrecht
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Stefani, F., Gerbeth, G., Gailitis, A. (1999). Velocity Profile Optimization for the Riga Dynamo Experiment. In: Alemany, A., Marty, P., Thibault, J.P. (eds) Transfer Phenomena in Magnetohydrodynamic and Electroconducting Flows. Fluid Mechanics and Its Applications, vol 51. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4764-4_3
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DOI: https://doi.org/10.1007/978-94-011-4764-4_3
Publisher Name: Springer, Dordrecht
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