Scattering of ultrasonic shock waves in suspensions of silica nanoparticles

Baudoin, Michael; Thomas, Jean-Louis; Coulouvrat, François; Chanéac, Corinne

Type de document :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1121/1.3533723

Titre :

Scattering of ultrasonic shock waves in suspensions of silica nanoparticles

Auteur(s) :

Baudoin, Michael [Auteur]

Institut des Nanosciences de Paris [INSP]
Thomas, Jean-Louis [Auteur]
Institut des Nanosciences de Paris [INSP]
Coulouvrat, François [Auteur]
Institut Jean Le Rond d'Alembert [DALEMBERT]
Chanéac, Corinne [Auteur]
Laboratoire de Chimie de la Matière Condensée de Paris [LCMCP]

Titre de la revue :

Journal of the Acoustical Society of America

Pagination :

1209-1220

Éditeur :

Acoustical Society of America

Date de publication :

2011

ISSN :

0001-4966

Discipline(s) HAL :

Physique [physics]/Mécanique [physics]/Acoustique [physics.class-ph]

Résumé en anglais : [en]

Experiments are carried out to assess, for the first time, the validity of a generalized Burgers’ equation, introduced first by Davidson [J. Acoust. Soc. Am. 54, 1331–1342 (1973)] to compute the nonlinear propagation of ...
Lire la suite >Experiments are carried out to assess, for the first time, the validity of a generalized Burgers’ equation, introduced first by Davidson [J. Acoust. Soc. Am. 54, 1331–1342 (1973)] to compute the nonlinear propagation of finite amplitude acoustical waves in suspensions of “rigid” particles. Silica nanoparticles of two sizes (33 and 69 nm) have been synthesized in a water–ethanol mixture and precisely characterized via electron microscopy. An acoustical beam of high amplitude is generated at 1 MHz inside a water tank, leading to the formation of acoustical shock waves through nonlinear steepening. The signal is then measured after propagation in a cylinder containing either a reference solution or suspensions of nanoparticles. In this way, a “nonlinear attenuation” is obtained and compared to the numerical solution of a generalized Burgers’ equation adapted to the case of hydrosols. An excellent agreement (corresponding to an error on the particles size estimation of 3 nm) is achieved in the frequency range from 1 to 40 MHz. Both visco-inertial and thermal scattering are significant in the present case, whereas thermal effects can generally be neglected for most hydrosols. This is due to the value of the specific heat ratio of water–ethanol mixture which significantly differs from unity.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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