Rotational viscosity of ferrofluids and the Taylor instability in a magnetic field |
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Authors: | M. Holderied L. Schwab K. Stierstadt |
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Affiliation: | (1) Sektion Physik der Universität München, D-8000 München 40, Germany |
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Abstract: | We have measured the rotational viscosity of a concentrated ferrofluid by observing the increase of the first critical angular velocity in a Taylor cell with longitudinal magnetic field. The method is suitable for a very accurate determination of because of the sensitivity of the onset of Taylor instabilities to the effective viscosity of the fluid. The results are in agreement with recent theoretical investigations. |
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