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Start Over Topic acoustics Publication Year Range Last 50 years
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1. Spark-induced consolidation of biological sludge.

Author

Yang J, Hartong B, Carleton J, and Banerjee S

Subjects
Calcium Compounds, Electricity, Oxides, Acoustics, Sewage, Waste Disposal, Fluid methods
Abstract

Subjecting a suspension of biological sludge to underwater sparks (3kV, 50kA) leads to its consolidation, decreases the charge density on the solids, and increases its settling rate. The cake solids increase, but by only one percentage point. High-speed video images show that the spark generates a steam bubble. The dynamics of bubble growth could be estimated through the Rayleigh model. The bubble collapses into an acoustic field, which then agglomerates the particles. Sparking does not affect the settling rate of an aqueous slurry of softwood pulp because the fibrous particles are too large to be aggregated by an acoustic pulse.

Published
2005
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2. Folding a focalized acoustical vortex on a flat holographic transducer: Miniaturized selective acoustical tweezers

Author

Olivier Bou Matar, Michael Baudoin, Antoine Riaud, Jean Louis Thomas, J.-C. Gerbedoen, Nikolay Smagin, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Puissance - IEMN (PUISSANCE - IEMN), Fudan University [Shanghai], State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Transduction, Propagation et Imagerie Acoustique - IEMN (TPIA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Acoustique pour les nanosciences (INSP-E3), Institut des Nanosciences de Paris (INSP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), AcknowledgmentsWe acknowledge the platform 'WaveSurf' from Université Polytechnique Hauts-de-France for performing the measurements with the laser interferometer. We also acknowledge A. Vlandas for critical reading of the manuscript and valuable advices that helped us improve its overall quality. Funding: This work was supported by SATT Nord. Author contributions: M.B., A.R., and J.-L.T. designed the research. M.B. and J.-C.G. built the setup and performed the experiments. M.B. and A.R. performed the numerical simulations. O.B.M., J.-C.G., and N.S. performed the field measurements with the interferometer. M.B., O.B.M., A.R., and J.-L.T. analyzed and interpreted the results. M.B., O.B.M., J.-C.G., A.R., and J.-L.T. wrote the paper. All authors approved the final version of the manuscript. Competing interests: J.-L.T., O.B.M., A.R., and M.B. are inventors on a patent application related to this work filed with the European Patent Office (application no. EP17198204.4, submitted 25 October 2017). All other authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors., RENATECH, Baudoin, Michael, Médecine Personnalisée, Pharmacogénomique, Optimisation Thérapeutique (MEPPOT - U1147), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520 ( IEMN ), Ecole Centrale de Lille-Institut supérieur de l'électronique et du nunérique (ISEN)-Université de Valenciennes et du Hainaut-Cambresis ( UVHC ) -Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Université Paris Sorbonne Cité, INSERM UMR-S1147, Institut des Nanosciences de Paris ( INSP ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
[PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], [PHYS.PHYS.PHYS-CLASS-PH]Physics [physics]/Physics [physics]/Classical Physics [physics.class-ph], Materials science, Acoustics, Microfluidics, Holography, FOS: Physical sciences, Physics - Classical Physics, Applied Physics (physics.app-ph), 02 engineering and technology, 01 natural sciences, law.invention, Engineering, [ PHYS.PHYS.PHYS-CLASS-PH ] Physics [physics]/Physics [physics]/Classical Physics [physics.class-ph], law, 0103 physical sciences, Tweezers, Miniaturization, Piezoelectric substrate, 010306 general physics, Research Articles, [ PHYS.MECA.ACOU ] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Applied Physics, Multidisciplinary, Fluid Dynamics (physics.flu-dyn), SciAdv r-articles, Classical Physics (physics.class-ph), Physics - Applied Physics, Physics - Fluid Dynamics, [PHYS.PHYS.PHYS-FLU-DYN] Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], 021001 nanoscience & nanotechnology, Vortex, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Folding (chemistry), Transducer, [ PHYS.PHYS.PHYS-FLU-DYN ] Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn], [PHYS.PHYS.PHYS-CLASS-PH] Physics [physics]/Physics [physics]/Classical Physics [physics.class-ph], [PHYS.MECA.ACOU] Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], 0210 nano-technology, Research Article
Abstract

Selective manipulation of micrometric objects in a standard microscopy environment is possible with miniaturized acoustical tweezers., Acoustical tweezers based on focalized acoustical vortices hold the promise of precise contactless manipulation of millimeter down to submicrometer particles, microorganisms, and cells with unprecedented combined selectivity and trapping force. Yet, the widespread dissemination of this technology has been hindered by severe limitations of current systems in terms of performance and/or miniaturization and integrability. Here, we unleash the potential of focalized acoustical vortices by developing the first flat, compact, paired single electrode focalized acoustical tweezers. These tweezers rely on spiraling transducers obtained by folding a spherical acoustical vortex on a flat piezoelectric substrate. We demonstrate the ability of these tweezers to grab and displace micrometric objects in a standard microfluidic environment with unique selectivity. The simplicity of this system and its scalability to higher frequencies open tremendous perspectives in microbiology, microrobotics, and microscopy.

Published
2019

3. Signal analysis of a double-diode autodyne

Author

A. P. Chupahin, G. P. Ermak, V. Ya. Noskov, K. A. Ignatkov, Sergey M. Smolskiy, A. S. Vasiliev, and The present paper is prepared in accordance with an Agreement on scientific-technological cooperation between IRE NASU, UrFU and NRU 'MPEI', as well as at financial support of Russian Federation Government, order No. 211, contract # 02.A03.21.0006.

Subjects
010302 applied physics, Coupling, Physics, Signal processing, Autodyne, business.industry, Acoustics, Electrical engineering, 020206 networking & telecommunications, 02 engineering and technology, Flange, 01 natural sciences, Signal, law.invention, autodyne, autodyne signal, autodyne response, double-diode autodyne, mutual locking, partial oscillator, law, Q factor, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Radar, business, Diode
Abstract

Analysis results of autodyne signals of the double-diode oscillator, which is under influence of the proper reflected emission from the moving object, are presented. The analysis is performed on the base of the autodyne mathematical model presented in the form of a system of two mutually-locked partial oscillators under condition of strong mutual coupling. Peculiarities of signal formation are considered for various parameters of partial oscillators and coupling conditions. Experimental data are obtained for the 8mm-range Gunn double-diode oscillator of the flange type.

Published
2017

4. Influence of the autodyne oscillator coupling degree with antenna upon its transfer and noise characteristics

Author

V. Ya. Noskov, A. P. Chupahin, G. P. Ermak, K. A. Ignatkov, Sergey M. Smolskiy, A. S. Vasiliev, and The present paper is prepared in accordance with an Agreement on scientific-technological cooperation between IRE NASU, UrFU and NRU 'MPEI', as well as at financial support of Russian Federation Government, order No. 211, contract # 02.A03.21.0006.

Subjects
010302 applied physics, Coupling, Physics, Autodyne, business.industry, Acoustics, autodyne, autodyne response, impedance characteristic, autodyne amplification factor, autodyne frequency deviation, UHF oscillator, Electrical engineering, 020206 networking & telecommunications, 02 engineering and technology, Frequency deviation, 01 natural sciences, Noise (electronics), 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Antenna (radio), Driven element, business, Electrical impedance, Gunn diode
Abstract

Analysis results of coupling degree influence of the autodyne oscillator with an antenna are presented together with influence of the impedance characteristic type (soft or rigid) of the active element on the coefficients of autodyne amplification, autodyne frequency deviation and power transfer as well as on the noise parameters and characteristics. Analytical and numerical calculations of above-mentioned parameters and characteristics are performed, and results of experimental investigations of the 8mm-range Gunn diode autodyne are given.

Published
2017