Abstract
The propagation of elastic perturbations in magneto-rheologicalsuspensions is studied theoretically and experimentally. Under theapplication of a magnetic field, these systems acquire a fibrillarfractal structure formed by clusters. In systems in that condition,two low-frequency sound propagation modes have been observed.In both of them, the speed of sound depends on the intensity of theapplied field. We discuss the statistical fractal properties of thecluster structure and, on this basis, we calculate the speed ofsound for both of the low-frequency modes. This theoreticalapproach provides a good quantitative agreement with theexperimental results.
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