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Generation of vorticity motion by sound in a chemically reacting gas and inversion of acoustic streaming in the non-equilibrium regime

100%
Perelomova A., Wojda P.
Open Physics
|
2011
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vol. 9
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issue 3
740-750
EN
Nonlinear stimulation of the vorticity mode caused by losses in the momentum of sound in a chemically reacting gas is considered. The instantaneous dynamic equation for the vorticity mode is derived. It includes a quadratic nonlinear acoustic source, which reflects the fact that the reason for the interaction between sound and the vorticity mode is nonlinear. Both periodic and aperiodic sound may be considered as the origin of the vorticity flow. The equation governing the mean flow (the acoustic streaming) in the field of periodic sound is also derived. In the non-equilibrium regime of a chemical reaction, there may exist streaming vortices whose direction of rotation is opposite to that of the vortices in the standard thermoviscous flows. For periodic sound, this is illustrated by an example. The theory and the example describe both equilibrium and non-equilibrium chemical reactions.
2
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The vortex flow caused by sound in a bubbly liquid

100%
Perelomova A., Wojda P.
Open Physics
|
2014
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vol. 12
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issue 5
305-314
EN
Generation of vorticity in the field of intense sound in a bubbly liquid in the free half-space is considered. The reasons for generation of vorticity are nonlinearity, diffraction, and dispersion. Acoustic streaming differs from that in a Newtonian fluid. Under some conditions, the vortex flow changes its direction. Conclusions concern streaming induced by a harmonic or an impulse Gaussian beam.
3
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Repetitive Acoustic Streaming Patterns in Sinusoidal Shaped Microchannels

88%
Jannesar E., Hamzehpour H., Jannesar E., Hamzehpour H.
Archives of Acoustics
|
2020
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vol. 45
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issue 1
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