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Phys. Rev. Lett. 82, 727–730 (1999)

Sound in a Magnetorheological Slurry

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Y. Nahmad-Molinari, C. A. Arancibia-Bulnes*, and J. C. Ruiz-Suárez
Departamento de Física Aplicada, CINVESTAV-IPN, Unidad Mérida, A. P. 73 “Cordemex,” 97310 Mérida, Yucatán, México

Received 25 September 1998; published in the issue dated 25 January 1999

See accompanying Physics Focus

We study the propagation of an elastic excitation through a magnetorheological slurry made of hydrogen-reduced iron particles suspended in glycerine. Two different low-frequency longitudinal modes are observed, the second of them appearing as soon as a magnetic field is applied to the fluid. The first mode travels through glycerine channels within the suspension, whereas the second one propagates through the fibrillated structure formed by the iron particles. This second mode is very strong in amplitude and travels at lower speeds, depending on the magnetic field intensity.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.727
DOI:
10.1103/PhysRevLett.82.727
PACS:
43.35.+d, 62.30.+d

*Present address: CIE-UNAM, A. P. 34, Temixco, 62580, Morelos, México.

See Also

Comment: David Linton Johnson, Biot Slow Wave in a Magnetorheological Slurry?, Phys. Rev. Lett. 84, 396 (2000).

Comment: Helmut R. Brand and Harald Pleiner, Origin of the Slow Wave in a Magnetorheological Slurry, Phys. Rev. Lett. 86, 1385 (2001).

 
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