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Related Experiment Video

Updated: Jul 4, 2026

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

Tailored mixing inside a translating droplet.

R Chabreyrie¹, D Vainchtein, C Chandre

¹Mechanical Engineering Department, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|June 4, 2008

Summary

This summary is machine-generated.

Controlled mixing in microfluidic droplets is achieved by rotating them. Adjusting rotation frequency and amplitude tunes mixing efficiency, enabling controlled reactions in microreactors.

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Last Updated: Jul 4, 2026

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Published on: April 17, 2018

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Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

Published on: February 22, 2016

Area of Science:

Fluid dynamics
Microfluidics
Chemical engineering

Background:

Microreactors in digital microfluidic applications require controlled reactions.
Achieving efficient mixing within discrete fluid volumes is challenging.

Purpose of the Study:

To investigate a method for controlled mixing in droplets using imposed rotation.
To explore tuning mixing by controlling rotation parameters.

Main Methods:

Imposing time-periodic rigid-body rotation on a translating spherical liquid drop.
Utilizing chaotic advection for mixing through stretching and folding.
Adjusting rotation amplitude and frequency based on resonance conditions and adiabatic invariants.

Main Results:

Rotation induces mixing via chaotic advection.
Mixing region location and size can be controlled by rotation parameters.
Complete mixing is achieved by increasing the size of the mixing region.

Conclusions:

Imposed rotation offers a method for controlled mixing in microfluidic droplets.
Tuning rotation parameters allows for precise control over mixing efficiency.
This technique enhances the utility of microreactors for controlled chemical reactions.