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Turbulent and Laminar Drag of Superfluid Helium on an Oscillating Microsphere

Jäger, J., Schuderer, B. and Schoepe, Wilfried (1995) Turbulent and Laminar Drag of Superfluid Helium on an Oscillating Microsphere. Phys. Rev. Lett. 74, p. 566.

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A magnetic sphere (radius 100 μm), levitating inside a superconducting niobium capacitor, is immersed into superfluid helium. Vertical oscillations of the sphere can be excited and detected. At resonance we measure the velocity amplitude as a function of the driving force between 0.35 and 2.2 K. In the linear regime (laminar flow) the drag is given by Stokes' solution above 1.1 K and by ballistic ...


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Item type:Article
Institutions:Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Prof. Wilfried Schoepe
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Dewey Decimal Classification:500 Science > 530 Physics
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Unknown
Item ID:29963
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