Acoustic noise spectra under hydrothermal conditions.
Acoustic spectra
Cavitation
Hydrothermal water
Titanium oxide nanoparticles
Journal
Ultrasonics sonochemistry
ISSN: 1873-2828
Titre abrégé: Ultrason Sonochem
Pays: Netherlands
ID NLM: 9433356
Informations de publication
Date de publication:
Oct 2020
Oct 2020
Historique:
received:
02
01
2020
revised:
03
04
2020
accepted:
25
05
2020
pubmed:
2
6
2020
medline:
2
6
2020
entrez:
2
6
2020
Statut:
ppublish
Résumé
Acoustic noise spectra were studied for the first time in overheated water using sonohydrothermal reactor operating at 20 kHz ultrasound in the temperature range from 25 to 200 °C at the autogenic pressure of 1-14 bar. The obtained results highlighted a dominating role of stable cavitation during ultrasonic treatment of hot water. Heating of sonicated water results in the formation of large number of nonlinearly oscillating bubbles synchronous with the driving frequency. At 200 °C, the acoustic spectra also display strong subharmonic and multiple ultraharmonic bands. Moreover, cavitation bubbles formed at 200 °C exhibit chaotic and random motions. It has been shown that the addition of TiO
Identifiants
pubmed: 32480298
pii: S1350-4177(20)30004-3
doi: 10.1016/j.ultsonch.2020.105189
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
105189Informations de copyright
Copyright © 2020 Elsevier B.V. All rights reserved.