The two‐dimensional acoustic standing wave and its application in coagulation of aerosols

1998 ◽  
Vol 103 (5) ◽  
pp. 2764-2764 ◽  
Author(s):  
Henryka Czyż
Keyword(s):  
Standing Wave ◽  
Two Dimensional ◽  
Acoustic Standing Wave

Reduced acoustic resonator dimensions improve focusing efficiency of bacteria and submicron particles

The Analyst ◽  
2021 ◽  
Author(s):  
Masashi Ugawa ◽  
Hoyoen Lee ◽  
Thierry Baasch ◽  
Min-Ho Lee ◽  
Soyun Kim ◽  
...  
Keyword(s):  
Standing Wave ◽  
Acoustic Resonator ◽  
Submicron Particles ◽  
Two Dimensional ◽  
Acoustic Standing Wave ◽  
Single File

In this study, we demonstrate an acoustofluidic device that enables single-file focusing of submicron particles and bacteria using a two-dimensional (2D) acoustic standing wave. The device consists of a 100...

scholarly journals Influence of a Standing Wave Flow-Field on the Dynamics of a Spray Diffusion Flame

Fluids ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 27
Author(s):  
J. Barry Greenberg ◽  
David Katoshevski
Keyword(s):  
Liquid Phase ◽  
Flow Field ◽  
Standing Wave ◽  
Diffusion Flame ◽  
Stokes Number ◽  
Flame Height ◽  
Wave Flow ◽  
Two Dimensional ◽  
Governing Equations ◽  
First Time

A theoretical investigation of the influence of a standing wave flow-field on the dynamics of a laminar two-dimensional spray diffusion flame is presented for the first time. The mathematical analysis permits mild slip between the droplets and their host surroundings. For the liquid phase, the use of a small Stokes number as the perturbation parameater enables a solution of the governing equations to be developed. Influence of the standing wave flow-field on droplet grouping is described by a specially constructed modification of the vaporization Damkohler number. Instantaneous flame front shapes are found via a solution for the usual Schwab–Zeldovitch parameter. Numerical results obtained from the analytical solution uncover the strong bearing that droplet grouping, induced by the standing wave flow-field, can have on flame height, shape, and type (over- or under-ventilated) and on the existence of multiple flame fronts.

scholarly journals Analysis of the effects of acoustic levitation to simulate the microgravity environment on the development of early zebrafish embryos

RSC Advances ◽  
2020 ◽  
Vol 10 (72) ◽  
pp. 44593-44600
Author(s):  
Li Li ◽  
Ning Gu ◽  
Huijuan Dong ◽  
Bingsheng Li ◽  
Kenneth T. V. G.
Keyword(s):  
Wave Field ◽  
Standing Wave ◽  
Development Stage ◽  
Microgravity Environment ◽  
Acoustic Levitation ◽  
Zebrafish Embryos ◽  
Acoustic Standing Wave ◽  
Standing Wave Field

Influence of acoustic standing wave field creating acoustic levitation, on each development stage of early zebrafish embryos has been studied.

Effect of the Separation Distance on the Aeroacoustic Source of Multiple Shallow Cavities

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Ayman A. Shaaban ◽  
Samir Ziada
Keyword(s):  
Standing Wave ◽  
Separation Distance ◽  
Destructive Interference ◽  
Acoustic Standing Wave ◽  
Separation Ratio ◽  
Sound Levels ◽  
Standing Wave Method ◽  
Image Velocimetry ◽  
Strong Source ◽  
Shallow Cavities

Flow over ducted shallow cavities can excite fluid resonant oscillations. A common industrial application is the flow in corrugated pipes that can be modeled as a series of consecutive shallow cavities. In the current study, the effect of the separation distance on the aeroacoustic source of multiple shallow cavities is investigated. The standing wave method (SWM) is used to measure the source, where multiple microphones reconstruct the acoustic standing wave upstream and downstream of the cavities. The effect of the ratio between the separation distance to cavity length is investigated for a practical range from 0.5 to 1.375 for two- and three-cavity configurations. At low and intermediate sound levels, constructive hydrodynamic interference, resulting in a strong source, is observed for the extremum spacing ratios of 0.5 and 1.375. However, at high excitation levels, 10% and higher, the source, slightly but consistently, decreases upon increasing the separation ratio. These trends persist for both the double- and triple-cavity configurations. On the other hand, the separation distance of destructive interference is found to depend on the number of cavities of the tested configuration. Particle image velocimetry (PIV) measurements of the constructive interference cases show strong synchronized vorticity shedding in all cavities. Each cavity contribution to the total aeroacoustic source is then examined by means of Howe's analogy, and the percentage contribution of each cavity is found to depend on the excitation level.

Sign in / Sign up

Export Citation Format

Share Document