Abstract The acoustic-energy loss was measured when the sound wave propagated through a layer of water fog. By the application of the sound attenuation theory in granular media and by means of the acoustic inverse (optimization) method, the size-distribution of the drops and the moisture content in the water fog were measured. It is demonstrated that the sizes of the water drops obey the normal distribution approximately. Comparison of the size-distribution results between data obtained by the inverse measurements and those obtained by the optic-microscopic-size methods shows good agreement with each other. The results of the moisture content and the thickness of the fog layers obtained by this method are also consistent with the results measured by other methods (for example, the water-content weight and the direct measurement of layer's thickness by a scale, etc.) reasonably.
Received: 27 April 1998
Revised: 11 June 1998
Accepted manuscript online:
(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in liquids, liquid crystals, suspensions, and emulsions)
Fund: Project supported by the National Natural Science Foundation of China (Grant No.19674062).
Cite this article:
Qian Zu-wen (钱祖文), Shao Dao-yuan (邵道远), Li Xian-hui (李贤徽), Wang De-zhao (汪德昭) ACOUSTIC INVERSE METHOD FOR MEASURING THE SIZE-DISTRIBUTION OF THE DROPS AND THE MOISTURE CONTENT IN WATER (CLOUD) FOG 1999 Acta Physica Sinica (Overseas Edition) 8 27
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