Modeling of ultrasound transmission through a solid-liquid interface comprising a network of gas pockets

Paumel, Kevin; Moysan, Joseph; Chatain, Dominique; Corneloup, Gilles; Baqué, F.

doi:10.1063/1.3611422

Cited by 5 publications

(5 citation statements)

References 28 publications

(31 reference statements)

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“…This method has shown the possibility to characterize wetting on polymer-based microstructures. Interesting results have been obtained by Paumet et al regarding ultrasonic transmission evaluation modeling in a lower frequency range (MHz) to characterize microstructure wetting states (using a nonintegrated method in which the transducers are not directly coupled to the chip) . We have already demonstrated the potential of a high-frequency acoustic method for detecting wetting states on micropatterned silicon surfaces and also for tracking wetting transitions on these microstructures …”

Section: Introductionmentioning

confidence: 94%

“…Interesting results have been obtained by Paumet et al regarding ultrasonic transmission evaluation modeling in a lower frequency range (MHz) to characterize microstructure wetting states (using a nonintegrated method in which the transducers are not directly coupled to the chip). 23 We have already demonstrated the potential of a high-frequency acoustic method for detecting wetting states on micropatterned silicon surfaces 24 and also for tracking wetting transitions on these microstructures. 25 In this paper we present for the first time a high-frequency (1 GHz) acoustic wave echography principle to determine the wetting of a droplet on a silicon nanopatterned surface.…”

Section: ■ Introductionmentioning

confidence: 99%

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High-Frequency Acoustic for Nanostructure Wetting Characterization

Lamant

Carlier

et al. 2014

Langmuir

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Nanostructure wetting is a key problem when developing superhydrophobic surfaces. Conventional methods do not allow us to draw conclusions about the partial or complete wetting of structures on the nanoscale. Moreover, advanced techniques are not always compatible with an in situ, real time, multiscale (from macro to nanoscale) characterization. A high-frequency (1 GHz) acoustic method is used for the first time to characterize locally partial wetting and the wetting transition between nanostructures according to the surface tension of liquids (the variation is obtained by ethanol concentration modification). We can see that this method is extremely sensitive both to the level of liquid imbibition and to the impalement dynamic. We thus demonstrate the possibility to evaluate the critical surface tension of a liquid for which total wetting occurs according to the aspect ratio of the nanostructures. We also manage to identify intermediate states according to the height of the nanotexturation. Finally, our measurements revealed that the drop impalement depending on the surface tension of the liquid also depends on the aspect ratio of the nanostructures. We do believe that our method may lead to new insights into nanoscale wetting characterization by accessing the dynamic mapping of the liquid imbibition under the droplet.

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Section: Introductionmentioning

confidence: 94%

Section: ■ Introductionmentioning

confidence: 99%

High-Frequency Acoustic for Nanostructure Wetting Characterization

Lamant

Carlier

et al. 2014

Langmuir

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“…Again, temperature can be a parameter of influence in the wetting of materials. For example, sodium does not wet stainless steel at 200 °C; however, it wets well at a temperature above 400 °C, as surface oxides react with sodium [5]. Note that when stainless steel wetting by sodium is achieved, it remains wetted even if temperature decreases.…”

Section: Ultrasonic Transducer For Non-destructive Testing (Ndt) Umentioning

confidence: 99%

Ultrasonic Transducer for Non-Destructive Testing of Structures Immersed in Liquid Sodium at 200 °C

Saillant¹,

Marlier²,

Navacchia

et al. 2019

Sensors

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TUCSS transducer (French acronym standing for Transducteur Ultrasonore pour CND Sous Sodium) is designed for performing NDT (Non-Destructive Testing) under liquid sodium. Under sodium, the tests results obtained show that these transducers have sufficiently good acoustic properties to perform basic NDT of a structure immersed under liquid sodium at about 200 °C using conventional immersion ultrasonic technics. Artificial defects were made next to an X-shaped weld and could clearly be detected.

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“…developed solutions for undersodium ultrasonic viewing for fast-breeder reactors [13]. A major difficulty is obtaining a good wetting of the transducer to avoid the trapping of gas bubbles, which reduce transmitted energy [14,15]. To improve ultrasonic systems, various designs have been studied using waveguides [16], arrays of transducers [17], arrays of electromagnetic acoustic transducers (EMATs) [18] or dedicated acoustic mirrors [19].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Fluid Dynamics Monitoring Using Ultrasonic Measurements

et al. 2021

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The simulation of the propagation of ultrasonic waves in a moving fluid will improve the efficiency of the ultrasonic flow monitoring and that of the in-service monitoring for various reactors in several industries. The most recent simulations are mostly limited to 3D representations of the insonified volume but without really considering the temporal aspect of the flow. The advent of high-performance computing (HPC) now makes it possible to propose the first 4D simulations, with the representation of the inspected medium evolving over time. This work is based on a highly accurate double simulation. A first computational fluid dynamics (CFD) simulation, performed in previous work, described the fluid medium resulting from the mixing of hot jets in a cold opaque fluid. There have been many sensor developments over the years in this domain, as ultrasounds are the only method able to give information in an opaque medium. The correct design of these sensors, as well as the precise and confident analysis of their measurements, will progress with the development of the modeling of wave propagation in such a medium. An important parameter to consider is the flow temperature description, as a temperature gradient in the medium deflects the wave path and may sometimes cause its division. We develop a 4D wave propagation simulation in a very realistic, temporally fluctuating medium. A high-performance simulation is proposed in this work to include an ultrasonic source within the medium and to calculate the wave propagation between a transmitter and a receiver. The analysis of the wave variations shows that this through-transmission setup can track the jet mixing time variations. The steps needed to achieve these results are described using the spectral-element-based numerical tool SPECFEM3D. It is shown that the low-frequency fluctuation of the liquid metal flow can be observed using ultrasonic measurements.

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Modeling of ultrasound transmission through a solid-liquid interface comprising a network of gas pockets

Cited by 5 publications

References 28 publications

High-Frequency Acoustic for Nanostructure Wetting Characterization

High-Frequency Acoustic for Nanostructure Wetting Characterization

Ultrasonic Transducer for Non-Destructive Testing of Structures Immersed in Liquid Sodium at 200 °C

Simulation of Fluid Dynamics Monitoring Using Ultrasonic Measurements

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