Generation of the vorticity mode by sound in a Bingham plastic

• Authors: Anna Perelomova , Pawel Wojda
• Languages of publication: EN

Abstracts

EN

This study investigates interaction between acoustic and non-acoustic modes, such as vorticity mode, in some class of a non-newtonian fluid called Bingham plastic. The instantaneous equations describing interaction between different modes are derived. The attention is paid to the nonlinear effects in the field of intense sound. The resulting equations which describe dynamics of both sound and the vorticity mode apply to both periodic and aperiodic sound of any waveform. They use only instantaneous quantities and do not imply averaging over the sound period. The theory is illustrated by an example of acoustic force of vorticity induced in the field of a Gaussian sound beam. Some unusual peculiarities in both sound and the vorticity induced in its field as compared to a newtonian fluid, are discovered.

Keywords

EN

non-newtonian fluids; nonlinear acoustics

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2011
• Volume: 9
• Issue: 5
• Pages: 1135-1143

Dates

published

1 - 10 - 2011

online

15 - 9 - 2011

Contributors

author

Anna Perelomova

• Faculty of Applied Physics and Mathematics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233, Gdansk, Poland

author

Pawel Wojda

• Faculty of Applied Physics and Mathematics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233, Gdansk, Poland

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Identifiers

DOI

10.2478/s11534-011-0029-0