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The mechanism of generation of acoustic streaming
Electronics and Communications in Japan, Part III: Fundamental Electronic Science (English Translation of Denshi Tsushin Gakkai Ronbunshi), 1998Acoustic streaming is a stationary fluid motion induced by intense ultrasound. This paper describes the mechanism of generation of acoustic streaming, theoretically and experimentally. A qualitative explanation in relation to acoustic radiation pressure is followed by a detailed discussion based on the formulation of the phenomenon.
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Acoustic streaming in a channel
The Journal of the Acoustical Society of America, 2022This paper presents an analysis of acoustic streaming in a 2D channel. The unsteady flow resulting from acoustic excitation of the enclosed fluid is of particular interest. The magnitude of the streaming velocity will depend on the Strouhal, S, and oscillatory Reynolds numbers, R.
Charles Thompson +2 more
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Acoustic streaming in the cochlea
The Journal of the Acoustical Society of America, 2022This presentation examines the fluid motion resulting from airborne and bone conduction excitation in the cochlea. The time-averaged velocity, termed acoustic streaming, driven by the gradient of the Reynolds stress, is of particular interest. The effect of asymmetry in the oval and the round window velocity and its influence pressure gradient across ...
Charles Thompson +3 more
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Redshift of acoustic waves in acoustic streaming
Physical Review E, 2003Redshift, namely, the frequency decline in the frequency spectrum of an acoustic wave in water, was observed by measuring the frequency spectrum of acoustic streaming in a standing wave field. We desire that relations of the energy epsilon and momentum mu of acoustic waves analogous to those under quantum conditions hold, that is, epsilon =n(p)h(omega),
Masanori, Sato +2 more
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Acoustic streaming: An in vitro study
Ultrasound in Medicine & Biology, 2003The aims of this study were, first, to determine if cyst size and cyst-to-transducer distance have an impact upon acoustic streaming and, second, to investigate the effect of cyst content viscosity on acoustic streaming using an artificial ovarian cyst model. Artificial ovarian cysts were constructed and suspended in a tissue-mimicking bath.
Lisa, Clarke +2 more
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Theoretical and Computational Fluid Dynamics, 1998
We discuss two types of acoustic streaming, namely the ``quartz wind'' and Rayleigh streaming. Both are associated with flows that are dominated by their fluctuating components, and owe their origin to the action of Reynolds stresses. In the former, these stresses arise within the main body of the fluid when an ultrasonic beam propagates into it; in ...
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We discuss two types of acoustic streaming, namely the ``quartz wind'' and Rayleigh streaming. Both are associated with flows that are dominated by their fluctuating components, and owe their origin to the action of Reynolds stresses. In the former, these stresses arise within the main body of the fluid when an ultrasonic beam propagates into it; in ...
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Microfluidic viscometer by acoustic streaming transducers
Lab on a Chip, 2023We introduce μVAST, a high-throughput acoustic microstreaming platform using second-order microstreaming to induce fluid transport and measure the viscosity of 16 samples, automating process flows in drug development, materials manufacturing and production.
Ruoyu Jiang +6 more
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The Journal of the Acoustical Society of America, 1990
There is a general formulation by Nyborg that accounts for the streaming inside the viscous boundary layer on a solid surface in the presence of a sound wave [W. L. Nyborg, J. Acoust. Soc. Am. 30, 329 (1958)]. Using the streaming velocity at the edge of the viscous layer from Nyborg’s theory as a slip boundary condition, the streaming pattern at large ...
Chun P. Lee, Taylor G. Wang
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There is a general formulation by Nyborg that accounts for the streaming inside the viscous boundary layer on a solid surface in the presence of a sound wave [W. L. Nyborg, J. Acoust. Soc. Am. 30, 329 (1958)]. Using the streaming velocity at the edge of the viscous layer from Nyborg’s theory as a slip boundary condition, the streaming pattern at large ...
Chun P. Lee, Taylor G. Wang
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Quantitative investigation of acoustic streaming in blood
The Journal of the Acoustical Society of America, 2002Acoustic streaming may have practical utility in diagnostic medical ultrasound in distinguishing between stagnant blood and tissue as well as clotted and unclotted blood. This distinction can be difficult with conventional ultrasound but have high value in managing trauma patients with internal hemorrhage.
Xuegong, Shi +3 more
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Acoustic streaming in a rotating fluid
The Journal of the Acoustical Society of America, 1990Acoustic streaming theory is derived that is applicable to a fluid that is slow moving in a reference frame that rotates with a constant angular velocity Ω. A simplified streaming equation is obtained for the special case in which the acoustic angular frequency ω is large relative to Ω, and the change in fluid density due to rotation alone is ...
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