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Mechanism of mass-transfer enhancement in textiles by ultrasound

✍ Scribed by Vijayanand S. Moholkar; Marijn M. C. G. Warmoeskerken; Claus Dieter Ohl; Andrea Prosperetti

Publisher
American Institute of Chemical Engineers
Year
2004
Tongue
English
Weight
327 KB
Volume
50
Category
Article
ISSN
0001-1541

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✦ Synopsis

Abstract

The intensification of wet textile processes, such as cleaning and dyeing, by application of ultrasound is well known. In these processes, mass transfer in the interyarn and intrayarn pores of the textile is the basic physical phenomenon. The results of experiments on textile cleaning, based on basic principles of acoustics and cavitation, coupled with analysis of the surface and cross section of the ultrasound‐treated textile and high‐speed imaging of the cleaning process, are reported. It is revealed that transient cavitation in the vicinity of the textile surface, and not the ultrasound wave itself, is the physical mechanism responsible for the enhanced cleaning effect. Intense microconvection due to the transient bubble motion driven by ultrasound enhances fluid flow and, thus, mass transfer through the textile. Β© 2004 American Institute of Chemical Engineers AIChE J, 50: 58–64, 2004

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