Acoustofluidics 19: ultrasonic microrobotics in cavities: devices and numerical simulation

Area of Science:

• Acoustic manipulation
• Microfluidics
• Robotics

Background:

• Acoustic radiation forces are vital for handling micro-particles like cells and beads.
• Precise control of acoustic fields is crucial for robotic applications.
• Gor'kov's potential models forces on spherical particles in acoustic fields.

Purpose of the Study:

• To demonstrate particle displacement and rotation using acoustic fields.
• To explore advanced modeling of acoustic-particle interactions.
• To validate numerical simulations with experimental findings.

Main Methods:

• Utilizing acoustic radiation forces generated by piezoelectric transducers.
• Controlling acoustic fields via excitation parameters (frequency, amplitude, phase, modulation).
• Employing numerical tools like Finite Volume Method and COMSOL for advanced modeling.

Main Results:

• Successfully demonstrated particle displacement and rotation in micro- and macro-chambers.
• Modeled acoustic-particle interactions beyond Gor'kov potential, including viscosity and near-wall effects.
• Achieved excellent agreement between experimental observations and numerical simulations.

Conclusions:

• Acoustic manipulation offers precise control over micro-particle handling.
• Advanced numerical modeling accurately predicts complex acoustic-particle interactions.
• This work provides a foundation for sophisticated robotic manipulation systems.