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Updated: Aug 15, 2025
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Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
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Three-dimensional modeling and experimentation of microfluidic devices driven by surface acoustic wave
Xia Liu1, Tengfei Zheng1, Chaohui Wang1
1State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China; Shaanxi Key Lab of Intelligent Robots, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
Ultrasonics
|December 28, 2022
Summary
Surface acoustic wave (SAW) devices precisely control micro-nano particles. Our 3D model shows acoustic forces enable complex 3D particle motion, crucial for SAW microfluidic chip design.
Area of Science:
- Acoustofluidics
- Microfluidics
- Nanotechnology
Background:
- Surface acoustic wave (SAW) technology offers precise particle manipulation.
- Understanding particle dynamics in acoustofluidic devices is essential for advanced applications.
Purpose of the Study:
- To present a fully-coupled 3D model of standing SAW acoustofluidic devices.
- To investigate particle motion influenced by acoustic pressure and streaming.
Main Methods:
- Utilized the improved limiting velocity method (ILVM) for simulation.
- Modeled acoustic pressure and acoustic streaming distributions.
- Simulated motion of 0.5-, 5-, and 10-μm micro-particles.
Main Results:
- Demonstrated inhomogeneous distribution of acoustic pressure and streaming.
- Showcased the interaction between acoustic radiation force and drag force.
- Confirmed that micro and nanoparticles exhibit three-dimensional movement.
Conclusions:
- The developed 3D model accurately predicts particle motion in SAW devices.
- Acoustic radiation force and streaming interaction drive complex 3D particle trajectories.
- This approach is vital for designing and controlling particles in SAW microfluidic systems.
