Scattering of ultrasonic shock waves in suspensions of silica nanoparticles

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

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1121/1.3533723

Title :

Scattering of ultrasonic shock waves in suspensions of silica nanoparticles

Author(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]

Journal title :

Journal of the Acoustical Society of America

Pages :

1209-1220

Publisher :

Acoustical Society of America

Publication date :

2011

ISSN :

0001-4966

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Popular science :

Non

Collections :

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

Source :

Harvested from HAL

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