Measurements Of Acoustic Parameters Of Clay Suspensions And Granulometric Analysis
Journal Title: American journal of Engineering Research - Year 2018, Vol 7, Issue 1
Abstract
This work is intended to provide elements of response to scientific and technical problems related to the implementation in treatment plant dam water. Several suspensions with different distribution of clay grains were studied. The results obtained show that the attenuation increases as a function of the frequency when the grain size increases, and that the shape of the curves shows the existence of two wave-particle interaction phenomena depending on the particle size and the frequency used. Indeed, at very low frequencies, and for very small particles (<2μm), the diffusion effect predominate (multiple diffusion regime). A linear dependence between attenuation and low frequencies exists, αclay (f)=k.f n with n=1. At high frequencies and for particle sizes (>10 μm), it is observed that the frequency dependence of the attenuation coefficient is important αclay(f)=k.f n with n=2, characterizing the effect of absorption. In the latter case, we can assimilate a suspension of clay to a polycrystalline material which caused the increase of the attenuation by the stochastic diffusion of the grains. So we can’t establish a linear relationship over the entire frequency range.
Authors and Affiliations
A. Hamine, B. Faiz, H. Ouacha
Keywords
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