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Related Experiment Video

Updated: Jul 14, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

Hydrodynamic phase separation and morphological evolution in chiral active-passive mixtures.

Mayurakshi Deb¹, Rajesh Singh¹

¹Department of Physics, Indian Institute of Technology Madras, Chennai, India. ph22d091@smail.iitm.ac.in.

|July 13, 2026

Summary

This study reveals how active spinners and passive colloids self-organize in chiral active matter. Distinct phase-separation regimes and unique structures like particle vortices and active-passive bands emerge due to hydrodynamic interactions.

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Last Updated: Jul 14, 2026

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Area of Science:

Soft matter physics
Non-equilibrium statistical mechanics
Active matter systems

Background:

Chiral active matter research often relies on external torques.
Intrinsic activity in chiral systems is less explored.
Understanding collective behavior of passive particles in active environments is crucial.

Purpose of the Study:

Investigate emergent dynamics in suspensions of active spinners and passive colloids.
Explore phase-separation regimes influenced by kinematic parameters.
Characterize structural morphologies and underlying dynamics.

Main Methods:

Many-body hydrodynamic interactions computed via Ewald summation.
Systematic exploration of area fractions and rotational velocities.
Analysis of temporal evolution of length scales and non-equilibrium velocity distributions.

Main Results:

Identification of distinct phase-separation regimes.
Observation of passive particle vortices around active spinners.
Formation of large-scale active-passive bands.

Conclusions:

Hydrodynamic couplings play a key role in self-organization.
Intrinsic chirality drives unique emergent dynamics in active-passive systems.
Findings offer new insights into non-equilibrium condensed matter self-assembly.