Theoretical Substantiation of the Mechanism of Ultrasonic Dehydration of Materials Without a Phase Transition of Liquid Into Vapor

V. N.  Khmelev; Хмелев В. Н.; A. V. Shalunov; Шалунов А. В.; R. N.  Golyx; Голых Р. Н.; S. A.  Terentiev; Терентьев С. А.; V. A.  Nesterov; Нестеров В. А.

doi:10.31857/S0040357123010062

Theoretical Substantiation of the Mechanism of Ultrasonic Dehydration of Materials Without a Phase Transition of Liquid Into Vapor

Authors: Khmelev V.N.¹, Shalunov A.V.¹, Golyx R.N.¹, Terentiev S.A.¹, Nesterov V.A.¹
Affiliations:
1. Biysk Technological Institute, FSBEI HE I.I. Polzunov Altai State Technical University
Issue: Vol 57, No 1 (2023)
Pages: 60-70
Section: Articles
URL: https://journals.rcsi.science/0040-3571/article/view/138400
DOI: https://doi.org/10.31857/S0040357123010062
EDN: https://elibrary.ru/CBIACY
ID: 138400

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Abstract

The article theoretically substantiates the ability of ultrasonic vibrations to dehydrate capillary-porous materials due to the dispersion of moisture from the capillaries and pores of the material under the action of shock waves formed by cavitation bubbles. A phenomenological model is presented based on the analysis of the slow growth of a distorted cylindrical cavitation bubble, taking into account the influence of the cylindrical capillary walls limiting its oscillations. The optimal range (150–170 dB) of ultrasonic pressure levels is revealed, at which the mechanism of cavitation moisture dispersion is realized. It is established that the optimal conditions for the action of ultrasonic vibrations on a dried material are realized when the dimensions or thicknesses of the layer of the dried material correspond to the length of ultrasonic vibrations in air.

References

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