Microgravity Science and Technology

, Volume 21, Issue 1–2, pp 119–122 | Cite as

Droplet Oscillations in High Gradient Static Magnetic Field

Original Article

Abstract

In high intensity and high gradient magnetic fields the volumetric force on diamagnetic material, such as water, leads to conditions very similar to microgravity in a terrestrial laboratory. In principle, this opens the possibility to determine material properties of liquid samples without wall contact, even for electrically non-conducting materials. In contrast, AC field levitation is used for conductors, but then terrestrial conditions lead to turbulent flow driven by Lorentz forces. DC field damping of the flow is feasible and indeed practiced to allow property measurements. However, the AC/DC field combination acts preferentially on certain oscillation modes and leads to a shift in the droplet oscillation spectrum.What is the cause? A nonlinear spectral numerical model is presented, to address these problems.

Keywords

Droplet oscillations Electromagnetic levitation Property measurements 

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References

  1. Bardet, B., Bojarevics, V., Pericleous, K., Etay, J.: Numerical simulation of free surface behaviour of a molten liquid metal droplet with and without electromagnetic induction. In: Proc. 5th EPM, pp. 306–310. Sendai, Japan (2006)Google Scholar
  2. Bojarevics, V., Pericleous, K.: Modelling E.M. levitated liquid droplet oscillations. ISIJ Int. 43(6), 890–898 (2003a)CrossRefGoogle Scholar
  3. Bojarevics, V., Pericleous, K.: Modelling induction skull melting design modifications. In: Lee, P., et al. (eds.) Proc. 2003 Int. Symp. LMPC, pp. 183–192. Nancy, France (2003b)Google Scholar
  4. Brooks, R.F., Day, A.P.: Effects of oxide skins on oscillations of E.M. levitated metal droplets. Int. J. Thermophys. 20, 1041–1050 (1999)CrossRefGoogle Scholar
  5. Egry, I.: Thermophysical property measurements on E.M. levitated samples. In: Proc. 4th EPM, pp. 295–300. Lyon (2003)Google Scholar
  6. Ikezoe, Y., Hirota, N., Nakgawa, J., Kitazawa, K.: Making water levitate. Nature 393, 749–750, (1998)CrossRefGoogle Scholar
  7. Motokawa, M.: Orientation and levitation effects in high magnetic fields. In: Proc. 3rd EPM, pp. 612–617. Nagoya (2000)Google Scholar
  8. Tsukada, T., Fukuyama, H., Kobatake, H.: Determination of thermal conductivity and emissivity of e.m. levitated high-temperature droplet: theory. Int. J. Heat Mass Transfer 50, 3054–3061 (2007)MATHCrossRefGoogle Scholar
  9. Wilcox, D.C.: Turbulence Modelling for CFD. DCW Industries, California (1998)Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Centre for Numerical Modelling and Process AnalysisThe University of GreenwichLondonUK

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