Recent progress of particle migration in viscoelastic fluids
Dan Yuan1, Qianbin Zhao, Sheng Yan
1School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia. weihuali@uow.edu.au.
Lab on a Chip
|January 18, 2018
Summary
Particle migration in viscoelastic fluids enables precise 3D focusing in simple channels. This review highlights recent advances and applications, including particle separation and cell analysis.
Area of Science:
- Fluid Dynamics
- Biophysics
- Materials Science
Background:
- Particle manipulation in Newtonian fluids often requires complex setups.
- Viscoelastic fluids offer unique hydrodynamic forces for particle focusing.
- Recent research has shifted from fundamental studies to practical applications.
Purpose of the Study:
- To review recent progress in particle migration within viscoelastic fluids.
- To emphasize the diverse applications of this phenomenon.
- To discuss future research directions.
Main Methods:
- Discussion of hydrodynamic forces acting on micro/nano particles.
- Elaboration of particle migration mechanisms in viscoelasticity-dominant and elasto-inertial fluids.
- Comprehensive review of experimental and computational studies.
Main Results:
- Viscoelasticity-induced particle migration allows for efficient 3D particle focusing in simple channels.
- Key applications include particle separation, cell deformability measurement, cell alignment, and microfluidic rheometry.
- The phenomenon is driven by viscoelastic forces, distinct from inertial or external field forces.
Conclusions:
- Particle migration in viscoelastic fluids presents a powerful, label-free method for microparticle manipulation.
- The field is rapidly advancing towards sophisticated applications in diagnostics and materials processing.
- Further research is needed to fully exploit the potential of viscoelastic effects in microfluidics.
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