2134/16342
Valerie Pinfield
Valerie
Pinfield
Thermo-elastic multiple scattering in random dispersions of spherical scatterers
Loughborough University
2014
untagged
Chemical Engineering not elsewhere classified
2014-11-24 13:30:51
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/Thermo-elastic_multiple_scattering_in_random_dispersions_of_spherical_scatterers/9244598
Ultrasonic monitoring of concentrated suspensions and emulsions is limited in concentration
range due to the inaccuracy of the multiple scattering models currently used to interpret
measurements. This paper presents the development of a model for the additional multiple
scattering caused by mode conversion to/from thermal waves. These effects are believed to cause
significant deviation from established models for emulsions at high concentration, or small
particle size, at low frequency. The relevant additional scattering coefficients (transition factors)
are developed, in numerical and analytical form, together with the modification to the effective
wavenumber. Calculations have been carried out for a bromohexadecane-in-water emulsion to
demonstrate the frequency-dependence of the scattering coefficients, and the effective speed and
attenuation.