RMES · Rotational mechanical effects of sound
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2022-09-01 → 2024-08-31
- EU contribution
- €196,708
- Participants
- 1
- Scheme
- MSCA-IF
Lines connect the coordinator with its partners.
Results in brief
Rotational mechanical effects of sound
The problem that is solved in the project is to find a way to demonstrate experimentally rotational mechanical effects of sound that can be used in the field of acoustic contactless manipulations. This field is important for society as used practically in rheology, medical imaging and other medical applications. The overall objectives of the project are to set an experimental pathway to benefit from the orbital angular momentum of sound for novel options to manipulate matter without contact. In conclusion, a versatile ultrasonic vortex source operating in the air at 100 kHz frequency was developped ; the first-time experimental demonstration of acoustic radiation torque from vortex beam redirection in a pure conversion regime of orbital angular momentum transfer was realised ; the existence of acoustic spin carried by acoustic vortex beams was unveiled experimentally.
Data: CORDIS, © European Union
Project objective
The exploratory studies on sound-matter interaction are to date one of the most promising directions as fundamentalresearch which can be used practically in rheology, medical imaging and other contactless manipulations. So far onlyacoustic radiation force is used in applications. The study of rotational mechanical effects of sound actually remains in itsinfancy and expected application potential invites a better understanding of acoustic radiation torques and furtherfundamental experimental investigations. With the aim at going beyond the state-of-the art, the research project proposes toexplore experimentally new facets of the rotational mechanical effects of sound based on the use of acoustic vortex beams,which are characterized by a helical wavefront bearing on-axis phase singularity. Indeed, depending on the specific wavematterinteraction, acoustic vortex beams can induce various rotational mechanical effects, such as angular displacements,spinning or orbiting motions. Our approach will first consist to study acoustic radiation torque effects that do not rely onsound-absorption, which corresponds to a sound-matter interaction regime barely explored experimentally. Also, we willunveil experimentally the existence of recently predicted a spin contribution to the total angular momentum of acoustic vortexbeams. For these purposes, we will firstly develop a toolbox allowing versatile acoustic vortex beam shaping in the ultrasonicregime owing to 3D printing technologies. Then, by using obtained vortex beams and appropriately designed sound-matterinteraction schemes, we will detect and monitor quantitatively the sought-after rotational mechanical effects. By addressingoriginal and timely scientific challenges on experimental grounds, the project will bring new knowledge in the field of acousticangular momenta and set a new state-of-the-art for acoustic contactless manipulations.
Original text from CORDIS.
Participants
- UNIVERSITE DE BORDEAUX · BordeauxCoordinatorFrance
Links
Data: CORDIS, © European Union