Fast acoustic streaming in standing waves: Generation of an additional outer streaming cell

Reyt, Ida; Daru, Virginie; Bailliet, Hélène; Moreau, Solène; Valière, Jean-Christophe; Baltean‐Carlès, Diana; Weisman, Catherine

doi:10.1121/1.4817888

Cited by 30 publications

(37 citation statements)

References 22 publications

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“…It was shown indeed that the same flow behavior is to be expected if M ≪ 1, Re ac ≫ 1 and Sh ≪ 1 (where Re ac = 1 2 ( λ π δν ) 2 , Sh = δν R , λ being the acoustic wavelength). Both experimental and numerical configurations match these conditions (see Table 1 in [29]).…”

Section: Methods and Set-upmentioning

confidence: 62%

“…Fig. 1(b) shows the distorted streaming pattern (result from the numerical simulation N 2 further described in this paper) in the fast streaming regime, when two new streaming cells are observed in the center of the guide, near the acoustic velocity antinode (z/L = 0) [19,28,29]. Several sources could potentially be responsible for this mutation of streaming pattern: thermal effects were considered [26], as well as nonlinear propagation [29] and it was concluded that inertial effects on acoustic streaming could be the main source [29].…”

Section: Introductionmentioning

confidence: 87%

“…In this section, the experimental setup and the numerical configurations and methods used to investigate the effect of inertia during the establishment of the streaming flow and on the steady state flow are presented briefly (see [29] for more detail). The experimental and numerical configurations are very different in physical dimensions and in frequency but it was checked in [29] that they are asymptotically similar for acoustic and streaming flow. It was shown indeed that the same flow behavior is to be expected if M ≪ 1, Re ac ≫ 1 and Sh ≪ 1 (where Re ac = 1 2 ( λ π δν ) 2 , Sh = δν R , λ being the acoustic wavelength).…”

Section: Methods and Set-upmentioning

confidence: 99%

“…The established streaming flow behavior for high acoustic amplitudes (i.e. in the nonlinear regime of streaming) was previously analyzed numerically [19] (with a DNS code) and experimentally [28]: additional streaming cells were observed inside the resonator [29]. Fig.…”

Section: Introductionmentioning

confidence: 97%

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Inertial effects on acoustic Rayleigh streaming flow: Transient and established regimes

et al. 2017

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h i g h l i g h t s• Nonlinear inertial effects produce patterns different from DNS and experiments. • Time evolutions of streaming cells near the wall and in the core are analyzed. • The full streaming equations are solved numerically to obtain the established flow. • Nonlinear inertial effects produce patterns different from DNS and experiments. • Nonlinear inertial effects cannot explain the mutation of streaming at high levels. a b s t r a c tThe effect of inertia on Rayleigh streaming generated inside a cylindrical resonator where a mono-frequency standing wave is imposed, is investigated numerically and experimen-tally. To this effect, time evolutions of streaming cells in the near wall region and in the resonator core are analyzed. An analogy with the lid-driven cavity in a cylindrical geometry is presented in order to analyze the physical meanings of the characteristic times.Inertial effects on the established streaming flow pattern are then investigated numeri-cally using a code solving the time averaged Navier-Stokes compressible equations, where a mono-frequency acoustic flow field is used to compute the source terms.It is shown that inertia of streaming cannot be considered as the leading phenomenon to explain the mutation of streaming at high acoustic levels.

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Section: Methods and Set-upmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 87%

Section: Methods and Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Inertial effects on acoustic Rayleigh streaming flow: Transient and established regimes

et al. 2017

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“…[2][3][4][5][6][7] The studies of Sharpe et al 2 and of Thompson and Atchley 4 first allowed quantitative studies of streaming velocity in the core region on the basis of particle image velocimetry (PIV) or laser Doppler velocimetry (LDV) measurements in the case of slow streaming. Later, measurements of fast acoustic streaming have been reported in Thompson et al, 5 Moreau et al, 6 and Nabavi et al 7 More recently, Reyt et al 8 proposed a comparison between numerical and experimental results of fast acoustic streaming. In all available studies of fast streaming, 1,5-12 both experimental and numerical, the authors observed a deformation of the streaming pattern when the nonlinear Reynolds number is increased.…”

Section: Introductionmentioning

confidence: 95%

Experimental investigation of acoustic streaming in a cylindrical wave guide up to high streaming Reynolds numbers

Reyt

Bailliet

Valière

2014

The Journal of the Acoustical Society of America

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Measurements of streaming velocity are performed by means of Laser Doppler Velocimetry and Particle Image Velociimetry in an experimental apparatus consisting of a cylindrical waveguide having one loudspeaker at each end for high intensity sound levels. The case of high nonlinear Reynolds number ReNL is particularly investigated. The variation of axial streaming velocity with respect to the axial and to the transverse coordinates are compared to available Rayleigh streaming theory. As expected, the measured streaming velocity agrees well with the Rayleigh streaming theory for small ReNL but deviates significantly from such predictions for high ReNL. When the nonlinear Reynolds number is increased, the outer centerline axial streaming velocity gets distorted towards the acoustic velocity nodes until counter-rotating additional vortices are generated near the acoustic velocity antinodes. This kind of behavior is followed by outer streaming cells only and measurements in the near wall region show that inner streaming vortices are less affected by this substantial evolution of fast streaming pattern. Measurements of the transient evolution of streaming velocity provide an additional insight into the evolution of fast streaming.

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Hysteretic behavior induced by an electroacoustic feedback loop in a thermo-acousto-electric generator

et al. 2016

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An active control method of the spatial distribution of the acoustic field is applied in a thermo-acousto-electric generator. An auxiliary acoustic source is used to force the self-sustained thermoacoustic oscillation in order to control the thermoacoustic amplification. The auxiliary source consists of a loudspeaker, located inside the loop-tube close to the main ambient heat exchanger, and supplied with a delayed signal through an electric feedback loop, comprising a phase-shifter and an amplifier, connected to a reference microphone. Experiments are performed on a prototype engine working with air at a static gauge pressure of 5 bars. Experimental results demonstrate how it is possible to tune the acoustic oscillations in order to increase the global performance of the generator, compared to the case without control, as well as the existence of a hysteretic behavior induced by the electroacoustic feedback loop itself, which leads to a discrepancy between the onset heat input and the offset one.

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Fast acoustic streaming in standing waves: Generation of an additional outer streaming cell

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Cited by 30 publications

References 22 publications

Inertial effects on acoustic Rayleigh streaming flow: Transient and established regimes

Inertial effects on acoustic Rayleigh streaming flow: Transient and established regimes

Experimental investigation of acoustic streaming in a cylindrical wave guide up to high streaming Reynolds numbers

Hysteretic behavior induced by an electroacoustic feedback loop in a thermo-acousto-electric generator

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