Numerical and Experimental Analysis of Microparticle Focusing and Separation in Split-Recombination Microchannel

Area of Science:

• Microfluidics
• Biophysics
• Particle Manipulation

Background:

• Inertial microfluidics is recognized for effective microparticle manipulation.
• It offers advantages like simplicity, high throughput, and no need for external fields.

Purpose of the Study:

• To describe a simple microfluidic device for microparticle manipulation.
• To investigate microparticle focusing and separation using inertial lift and Dean drag forces.

Main Methods:

• Design of a microfluidic device with split and recombination structures.
• Utilizing inertial lift and Dean drag forces for lateral microparticle migration.
• Numerical and experimental analysis of microparticle trajectories.

Main Results:

• Microparticles were focused into two distinct narrow streams.
• Increased channel angle significantly enhanced microparticle focusing.
• Successful separation of two different microparticle sizes was achieved.

Conclusions:

• The developed passive microfluidic device effectively focuses and separates microparticles.
• Its simplicity and high throughput make it suitable for biomedical and environmental applications.