Repozytorium publikacji - Politechnika Gdańska

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 describinginteraction between different modes are derived. The attention is paid to the nonlinear effects in the fieldof intense sound. The resulting equations which describe dynamics of both sound and the vorticity modeapply to both periodic and aperiodic sound of any waveform. They use only instantaneous quantities anddo not imply averaging over the sound period. The theory is illustrated by an example of acoustic force ofvorticity induced in the field of a Gaussian sound beam. Some unusual peculiarities in both sound and thevorticity induced in its field as compared to a newtonian fluid, are discovered.

Autorzy

• prof. dr hab. Anna Perelomova link otwiera się w nowej karcie ,
• dr inż. Paweł Wojda link otwiera się w nowej karcie