Abstract

ABSTRACT The sound velocity in a porous medium varies with the concentrations of, liquids, miscible or immiscible, that saturate the medium. The sensitivity of acoustic measurements lead to accuracies in fluid concentration better than 1 %. This technique is used to design a 3D acoustic scanner. Compared to X-ray or NMR computerized tomography, the acoustic scanner has poorer spatial resolution (3×3×3 mm3) but it is less expensive, faster and do not require any dopant. Most liquids and solids being transparent to acoustic waves, this technique is well suited for a wide range of sample coating, for example for studies under pressure.

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