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Nematic Order from Phase Synchronization of Shape Oscillations.
Ioannis Hadjifrangiskou1, Sumesh P Thampi1,2, Rahil N Valani1
1University of Oxford, Rudolf Peierls Centre for Theoretical Physics, Oxford OX1 3PU, United Kingdom.
Physical Review Letters
|August 27, 2025
Summary
Deformable particles in oscillatory shear flow develop nematic order through phase synchronization. This synchronized state, unique to deformable particles, offers insights into soft and active matter rheology.
Area of Science:
- Soft Matter Physics
- Rheology
- Non-Newtonian Fluids
Background:
- Understanding particle dynamics in complex fluids is crucial for soft and active matter.
- Previous studies often focused on rigid particles, limiting insights into deformable systems.
Purpose of the Study:
- To investigate the emergence of nematic order in suspensions of deformable particles under oscillatory shear flow.
- To elucidate the role of phase synchronization in this ordering phenomenon.
Main Methods:
- Simulating noninteracting deformable particles subjected to oscillatory shear flow.
- Analyzing the development of nematic order and phase synchronization.
- Mapping synchronized regions in the parameter space (amplitude and frequency).
Main Results:
- Oscillatory shear flow induces nematic order in deformable particle suspensions via phase synchronization.
- Deformable particles achieve synchronization by modulating aspect ratio and tumbling rate.
- Synchronized states form stable limit cycles and appear as Arnold tongues in parameter space.
Conclusions:
- Phase synchronization is a key mechanism for nematic ordering in deformable particle suspensions.
- The unique behavior of deformable particles enables this synchronization.
- Results suggest potential for experimental studies using oscillatory shear flow with deformable particles.
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