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Updated: Mar 22, 2026
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Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
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Characterization of steady streaming for a particle manipulation system
Roni Amit1, Avi Abadi1, Gabor Kosa2
1School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Ramat Aviv, Tel Aviv, Prefix: 69978, Israel.
Biomedical Microdevices
|April 25, 2016
Summary
This study introduces a hydrodynamic particle maneuvering system using piezoelectric cantilevers to create fluid flow for precise cell and particle manipulation. The system offers a non-contact method for positioning microscopic entities in biomedical applications.
Area of Science:
- Biomedical Engineering
- Fluid Dynamics
- Microfluidics
Background:
- Accurate non-contact positioning of microscopic particles and cells is crucial in biomedical engineering.
- Existing methods often rely on laser or ultrasonic actuation.
- A need exists for alternative, precise particle manipulation techniques.
Purpose of the Study:
- To design and characterize a novel hydrodynamic particle maneuvering system.
- To investigate the use of steady streaming induced by vibrating piezoelectric cantilevers for particle manipulation.
- To validate the system's performance numerically and experimentally.
Main Methods:
- Development of a hydrodynamic system utilizing piezoelectric cantilevers vibrating at high frequencies.
- Numerical and experimental characterization of the induced steady streaming flow field.
- Calibration of piezoelectric actuator oscillation amplitudes for particle control.
Main Results:
- The induced flow field resembles analytical solutions for an oscillating sphere.
- A validated quadratic relationship exists between steady streaming velocity and vibration amplitude.
- Effective positioning of particles (20 µm to 1 mm) was achieved using a 30x0.8x2 mm³ piezoelectric beam at 200 Hz.
Conclusions:
- The proposed hydrodynamic system enables precise, non-contact particle manipulation.
- Steady streaming generated by piezoelectric cantilevers is an effective mechanism for particle maneuvering.
- This technology has potential applications in cell sorting, drug delivery, and micro-assembly.
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