Acoustic Manipulation of a Liquid-filled Spherical Shell Activated with an Internal Spherical Oscillator
Following the advent of acoustic manipulation techniques and micro-scale delivery systems, especially in engineering and medical applications, a novel configuration of spherical carriers activated with an internally oscillating radiator is proposed in order to achieve complete handling. The theory of acoustic plane harmonic wave scattering and the exerted radiation force are developed for a spherical thin-shell filled with ideal fluid and activated with an internal dipole rigid spherical oscillator, in an exact manner. It is shown that the non-intuitive phenomenon of acoustic radiation force cancellation is viable for oscillation properties belong to a frequency dependant straight line equation in a real–imaginary plane of oscillating characteristics. This characteristic line divides the real–imaginary plane into two distinct regions: "the positive radiation force or pushing effects and the negative radiation force or pulling effects". This capability of producing both pushing and pulling effects leads to possibility of complete acoustic handling. This investigation introduces a new branch in acoustic manipulation techniques and carriers with great application in modern medicine and engineering.
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Document Type: Research Article
Publication date: 2017-03-01
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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