Ultrasonic wave velocity in the restructuring of disperse media

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• 作者：I. S. Koltsova ; A. S. Khomutova ; M. A. Deinega
• 关键词：ultrasonic waves ; velocity ; frequency ; particle size ; concentration ; cluster ; percolation ; porosity ; Hausdorff dimensionality
• 刊名：Acoustical Physics
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：62
• 期：2
• 页码：187-193
• 全文大小：1,150 KB
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• 作者单位：I. S. Koltsova (1)
  A. S. Khomutova (1)
  M. A. Deinega (1)
  
  1. St. Petersburg State University, Ul’yanovskaya ul. 1, Petrodvorets, St. Petersburg, 198504, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Acoustics
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-6865

文摘

The ultrasonic wave velocities in the restructuring of disperse media were measured using interference and pulsed techniques and the coefficient of reflection in suspensions of starch, Al₂O₃, and SiO₂ particles, glass bulbs, their porous sediments, and composites of Fe₃O₄ particles in 10% gelatin aqueous solution at a frequency of 3 MHz. The experiments showed alternating variation in the concentration velocity coefficient during the transition of the dispersed phase concentration from the subpercolation to percolation region. The minimum ultrasonic wave velocity in the region of discrete clusters correlates with the ratio between the particle and matrix densities. The results obtained are explained using the Isakovich, Chaban, Rytov, Biot, Hausdorff, and other theories.