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  • 1
    Online Resource
    Online Resource
    Effects of Nonlinearity in Development of Acoustic Streaming
    IOP Publishing ; 1995
    In:  Japanese Journal of Applied Physics Vol. 34, No. 5S ( 1995-05-01), p. 2584-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 5S ( 1995-05-01), p. 2584-
    Abstract: Development of acoustic streaming generated along the beam axis of ultrasound in unbounded medium is discussed using a numerical analysis. Acoustic nonlinearity changes the distribution of driving force of streaming. If fluid-dynamic nonlinearity is neglected, the streaming velocity essentially increases in proportion to the square of source amplitude. Incorporation of acoustic nonlinearity enhances the streaming velocity near the sound source and suppresses it at a farther distance compared to the acoustically linear case. When fluid-dynamic nonlinearity is taken into account, the fundamental trend in the increase of streaming velocity changes from the second power of the source amplitude toward the first power. Thus the fluid-dynamic nonlinearity delays the development of acoustic streaming.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.34.2584
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 1995
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
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  • 2
    Online Resource
    Online Resource
    Influence of dissolved oxygen content on multibubble sonoluminescence with ambient-pressure reduction
    Elsevier BV ; 2002
    In:  Ultrasonics Vol. 40, No. 1-8 ( 2002-05), p. 651-654
    Details
    In: Ultrasonics, Elsevier BV, Vol. 40, No. 1-8 ( 2002-05), p. 651-654
    Type of Medium: Online Resource
    ISSN: 0041-624X
    URL: Article
    DOI: 10.1016/S0041-624X(02)00192-0
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2002
    detail.hit.zdb_id: 2012001-1
    detail.hit.zdb_id: 200839-7
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  • 3
    Online Resource
    Online Resource
    Generation of a standing wave field using crossing sound beams for acoustic micromanipulation
    Acoustical Society of America (ASA) ; 1999
    In:  The Journal of the Acoustical Society of America Vol. 105, No. 2_Supplement ( 1999-02-01), p. 1017-1017
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 105, No. 2_Supplement ( 1999-02-01), p. 1017-1017
    Abstract: A novel sound-field generation method for noncontact manipulation of particles has been studied experimentally. Although it was possible to trap particles in water at nodes of a standing wave field generated between a transducer and a reflector and to transport them using a frequency-shifting operation, there were several problems, such as unstable force due to resonance of the sound field and different movement of trapped particles. The present paper describes a method to generate a standing wave field using plural sound sources without a reflector. When two transducers were settled with their sound-beam axes crossing to each other, a standing wave field was generated in the crossing region. Changing the mutual phase of transmitting signals between the transducers, the sound field was shifted laterally, keeping the same form. When polystyrene particles were poured with a pipette into the sound field, they were trapped at the nodes of the sound-pressure distribution and were transported stably. Using three transducers whose sound-beam axes were crossed at an angle of 120° to each other in a plane, a standing wave field was generated with a hexagonal node pattern, and two-dimensional manipulation of a particle was accomplished.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.424870
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1999
    detail.hit.zdb_id: 1461063-2
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  • 4
    Online Resource
    Online Resource
    Effect of ambient-pressure reduction on multibubble sonochemiluminescence
    AIP Publishing ; 2002
    In:  The Journal of Chemical Physics Vol. 116, No. 14 ( 2002-04-08), p. 6221-6227
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 116, No. 14 ( 2002-04-08), p. 6221-6227
    Abstract: The effect of ambient-pressure reduction on multibubble sonochemiluminescence (MBSCL) is studied experimentally with a luminol solution through measurements of MBSCL intensity as a function of ultrasound irradiation time, applied voltage to a transducer and ultrasonic frequencies to accomplish high efficiency in chemical reactions. From the measurement of ambient-pressure dependence, it is shown that there is an ambient pressure that produces the maximum intensity of the MBSCL and the maximum intensity appears at higher ambient pressure as the applied voltage to the transducer increases. The highest intensity of MBSCL is obtained by appropriate reduction of ambient pressure both for various applied voltages and frequencies. This is caused by both the number of bubbles induced with supersaturation of the gas in a luminol solution and the variation in bubble dynamics.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/1.1461357
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2002
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 5
    Online Resource
    Online Resource
    Micromanipulation using a focused ultrasonic standing wave field
    Wiley ; 2000
    In:  Electronics and Communications in Japan (Part III: Fundamental Electronic Science) Vol. 83, No. 1 ( 2000-01), p. 53-60
    Details
    In: Electronics and Communications in Japan (Part III: Fundamental Electronic Science), Wiley, Vol. 83, No. 1 ( 2000-01), p. 53-60
    Type of Medium: Online Resource
    ISSN: 1042-0967 , 1520-6440
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.1002/(SICI)1520-6440(200001)83:1〈〉1.0.CO;2-I
    DOI: 10.1002/(ISSN)1520-6440
    DOI: 10.1002/(SICI)1520-6440(200001)83:1〈53::AID-ECJC7〉3.0.CO;2-A
    Language: English
    Publisher: Wiley
    Publication Date: 2000
    detail.hit.zdb_id: 2028204-7
    detail.hit.zdb_id: 2526419-9
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  • 6
    Online Resource
    Online Resource
    Measurement of the establishment process of acoustic streaming using laser Doppler velocimetry
    Elsevier BV ; 1996
    In:  Ultrasonics Vol. 34, No. 2-5 ( 1996-6), p. 527-530
    Details
    In: Ultrasonics, Elsevier BV, Vol. 34, No. 2-5 ( 1996-6), p. 527-530
    Type of Medium: Online Resource
    ISSN: 0041-624X
    URL: Article
    DOI: 10.1016/0041-624X(95)00063-9
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1996
    detail.hit.zdb_id: 2012001-1
    detail.hit.zdb_id: 200839-7
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  • 7
    Online Resource
    Online Resource
    Evaluation of source sound pressure of an ultrasonic transducer using schlieren visualization
    Acoustical Society of America (ASA) ; 1995
    In:  The Journal of the Acoustical Society of America Vol. 98, No. 5_Supplement ( 1995-11-01), p. 2876-2876
    Details
    In: The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 98, No. 5_Supplement ( 1995-11-01), p. 2876-2876
    Abstract: Source sound pressure has been evaluated without disturbing the sound field using an optical method of schlieren visualization. The intensity of schlieren light is described as a function of the Raman–Nath parameter ν and increases monotonously up to ν=2.405. Experimental results showed that the light intensity on the sound beam axis changed with the applied voltage to the transducer in a similar manner to the above function. Then ν can be obtained numerically by substituting normalized experimental intensity for the function. Because the light passes through inhomogeneous sound field radiated from finite aperture, ν is affected by an integral optical effect. If the measuring position is fixed, this effect can be calculated theoretically in relation to the parameter just in front of the sound source defined as ν0. Hence the source sound pressure P0 is estimated from ν0 using transducer size, wavelength of the light, and the refractive index of medium. The upper limit for P0 of this method is 1×105 Pa in the present experiment.
    Type of Medium: Online Resource
    ISSN: 0001-4966 , 1520-8524
    URL: Article
    DOI: 10.1121/1.414394
    RVK:
    EQ 1000
    Language: English
    Publisher: Acoustical Society of America (ASA)
    Publication Date: 1995
    detail.hit.zdb_id: 1461063-2
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  • 8
    Online Resource
    Online Resource
    Control of a Standing Wave Field Using a Line-Focused Transducer for Two-Dimensional Manipulation of Particles
    IOP Publishing ; 1998
    In:  Japanese Journal of Applied Physics Vol. 37, No. 5S ( 1998-05-01), p. 2974-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 37, No. 5S ( 1998-05-01), p. 2974-
    Abstract: Control of the positions of particles using acoustic radiation pressure in water was studied to develop a noncontact micromanipulation technique. In this paper a method to transport the particles two-dimensionally using an ultrasonic standing wave field between a line-focused transducer with multiple electrodes and a reflector placed at the focal line is described. When alumina suspension of mean diameter 16 µm was poured into the standing wave field of 2.1 MHz, the particles were trapped and agglomerated at sound pressure nodes existing at half wavelength on the sound beam axis near the reflector. Changing the frequency alters the wave-length and hence the interval of agglomeration. Therefore the trapped particles were transported along the sound beam axis. When the next electrodes were driven, the standing wave field shifted laterally and the trapped particles moved to the corresponding nodal points. Thus two-dimensional transportation was realized using the line-focused transducer. A sound field generated by the line-focused transducer was discussed based on numerical calculations to design an optimum shape of a transducer for manipulation.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.37.2974
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
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  • 9
    Online Resource
    Online Resource
    Measurement of Distribution of Acoustic Radiation Force Perpendicular to Sound Beam Axis
    IOP Publishing ; 1999
    In:  Japanese Journal of Applied Physics Vol. 38, No. 5S ( 1999-05-01), p. 3297-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 38, No. 5S ( 1999-05-01), p. 3297-
    Abstract: To clarify the range of force acting on a particle in the direction perpendicular to the sound beam axis of an ultrasonic standing wave for particle manipulation, the radiation force on a polystyrene sphere of submillimeter size was measured through observation of its movement in a 1.75 MHz ultrasonic standing wave. The radiation force was estimated at some points by balancing with the force from viscous drag proportional to the measured velocity of a particle and the gravitational force, and its distribution was determined. The measured distribution of the radiation force agreed qualitatively with the theoretical distribution derived from Nyborg's formula. The influence of gravitational force on a stable position was also investigated. It was shown that the shift from the stable position is marked for particles with large radius. This effect should be considered in particle manipulation.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.38.3297
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 1999
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
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  • 10
    Online Resource
    Online Resource
    Observation of a Sonoluminescing Bubble Using a Stroboscope
    IOP Publishing ; 2000
    In:  Japanese Journal of Applied Physics Vol. 39, No. 5S ( 2000-05-01), p. 2967-
    Details
    In: Japanese Journal of Applied Physics, IOP Publishing, Vol. 39, No. 5S ( 2000-05-01), p. 2967-
    Abstract: A method to observe sonoluminescing bubble motion has been studied. By a single flash of a stroboscope much shorter than the acoustic cycle, a charge coupled device (CCD) camera captures an instantaneous image of the bubble, which includes the dancing condition. Changing the flash timing of the stroboscope slowly made it possible to observe periodical expansion and contraction of the bubble. It is clarified that the bubble size and the phase at the time the bubble collapses changes according to the amplitude of sound pressure.
    Type of Medium: Online Resource
    ISSN: 0021-4922 , 1347-4065
    URL: Article
    DOI: 10.1143/JJAP.39.2967
    RVK:
    UA 4210.1
    RVK:
    UA 4210.2
    RVK:
    UA 4210
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2000
    detail.hit.zdb_id: 218223-3
    detail.hit.zdb_id: 797294-5
    detail.hit.zdb_id: 2006801-3
    detail.hit.zdb_id: 797295-7
    Location Call Number Limitation Availability
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