CFD modeling of convection heat transfer using 1.7 MHz and 24 kHz ultrasonic waves: a comparative study

Dehbani, Maryam; Rahimi, Masoud; Abolhasani, Mahdieh; Maghsoodi, Abbas; Afshar, Parisa Ghaderi; Dodmantipi, Ali Reza; Alsairafi, Ammar Abdulaziz

doi:10.1007/s00231-014-1346-9

Cited by 22 publications

(4 citation statements)

References 34 publications

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“…The authors suggested that acoustic cavitation may disturb the thermal boundary layer, thus resulting in heat transfer enhancement. Some studies have also shown that acoustic streaming, when generated close to a heating surface, may disturb the thermal boundary layer and thus improve convective heat transfer [6,19].…”

Section: Bibliographic Surveymentioning

confidence: 99%

Ultrasonically-enhanced convective heat transfer: Evidence of a relationship with the thermal boundary layer

Poncet

Ferrouillat

Vignal

et al. 2022

Applied Thermal Engineering

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Section: Bibliographic Surveymentioning

confidence: 99%

Ultrasonically-enhanced convective heat transfer: Evidence of a relationship with the thermal boundary layer

Poncet

Ferrouillat

Vignal

et al. 2022

Applied Thermal Engineering

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“…However, the simulation and measurements times were too short (0.588 s) to reach the fully developed stable flow patterns. Another work investigated the effect of ultrasonic waves (microstreaming and cavitation) of 24 kHz and acoustic streaming at 1.7 MHz on the heat transfer of a thin platinum wire . The study was performed using one transducer, and only simulated flow fields were shown.…”

Section: Introductionmentioning

confidence: 99%

“…Another work investigated the effect of ultrasonic waves (microstreaming and cavitation) of 24 kHz and acoustic streaming at 1.7 MHz on the heat transfer of a thin platinum wire. 27 The study was performed using one transducer, and only simulated flow fields were shown. The authors found that at 1.7 MHz, the heat transfer rate increased more efficiently than at low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Hydrodynamic Performance of High-Frequency Sonoreactors Using PIV

Rivadeneyra-Romero

Torres

González-Neria

et al. 2020

Ind. Eng. Chem. Res.

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In this work, the influence on the flow behavior produced by different operating conditions (varying power dissipation of 300 and 450 W, that is, 60 and 90% of maximum power and two frequencies of 500 and 1000 kHz) in sonoreactors was experimentally characterized by 2D-PIV (particle image velocimetry) technique. Based on the experimental measurements performed at the different operational conditions of power and frequency, the velocity fields produced by the interaction of twelve piezoelectrics operating at the same time were obtained. The vorticity and Reynolds distribution maps at different operating conditions were also obtained. The axial circulation time (t ax ) was experimentally measured showing a significant decrease for higher power and frequency levels. The fastest t ax obtained was 5.79 s. Energy efficiency and the specific power consumption (P/V) were also estimated at both ultrasonic frequencies and powers. Energy efficiency showed a strong dependence on specific power consumption. Distinctive recirculation patterns defined by two large lateral loops interacting with other less energetic were identified. A dimensionless number (N QP(z) ) that measures the ratio between the axial flow rate (Q ax(z) ) and ultrasonic power (P us ) is proposed. The experimental PIV measurements showed that velocity components aligned to the acoustic streaming, prevailed over perpendicular components. Highest velocities were reached at 1000 kHz and increased with ultrasonic power. At this frequency, the highest efficient axial circulation was reached and the shorter mixing times θ 95 and t ax were obtained.

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“…Some of the simulation studies using CFD in sonochemical reactors include the research carried out for evaluating the mixing rate modeling the piezoelectric movement at a frequency of 1.7 MHz [11], which found the acoustic current was in the direction of the propagation of the wave and its maximum velocity near the piezoelectric surface. Another work [12] investigated the effect of ultrasonic waves (microcurrents and cavitation) of 24 kHz and 1.7 MHz on the heat transfer of a thin platinum wire. It is important to emphasize that the most studies about ultrasonic reactors has been carried out on horn laboratory reactors, in this sense it has been studied the numerical simulation of ultrasonic horn transducer (acoustic supercavitation) [13] and tested various cavitation models, reporting that none of them adequately predicted the main characteristics of the cavitation flow in the vicinity of the sonotrode tip.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Simulation of An Industrial Sonoreactor Performance

Gabriela¹,

Carmen²,

Jose³

et al. 2019

JACS

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In this work, the velocity fields and vorticity of an industrial bath sonoreactor of 500 kHz were obtained experimentally evaluated by PIV technique. Based on the results obtained immediately after the sonoreactor was turned on, the velocity and the axial flow number (()), were calculated at different times. The formation of stable vortexes, near the sonoreactor walls, were observed after 5 minutes of sonoreactor operation. Due to the difficulty of perform measurements during the initial operation time simulations performed at small period of time were performed by the Large Eddy Simulation (LES), showing the trend of the flow in the sonoreactor.

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CFD modeling of convection heat transfer using 1.7 MHz and 24 kHz ultrasonic waves: a comparative study

Cited by 22 publications

References 34 publications

Ultrasonically-enhanced convective heat transfer: Evidence of a relationship with the thermal boundary layer

Ultrasonically-enhanced convective heat transfer: Evidence of a relationship with the thermal boundary layer

Evaluation of the Hydrodynamic Performance of High-Frequency Sonoreactors Using PIV

Evaluation and Simulation of An Industrial Sonoreactor Performance

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