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Particles settling studies using ultrasonic techniques

โœ Scribed by A. Shukla; A. Prakash; S. Rohani

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
871 KB
Volume
177
Category
Article
ISSN
0032-5910

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โœฆ Synopsis

Effects of acoustic velocity and attenuation measurements during settling of 43-, 110-and 168-ฮผm glass beads in water are reported. Ultrasonic waves were generated at a frequency of 3.2 MHz. An abrupt increase in acoustic velocity and a sharp peak in the attenuation characterized the onset of settled bed. The observed attenuation peak at the transition between suspended and settled bed was attributed to dissipation caused by viscous absorption losses. The critical concentration at which increase in acoustic velocity and attenuation peak occurred was estimated for these particle sizes.

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