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Channel Flows of Deformable Nematics.

Ioannis Hadjifrangiskou1, Sumesh P Thampi1,2, Julia M Yeomans1

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Summary
This summary is machine-generated.

Particle deformability in nematic flows causes complex behaviors like shape oscillations and banding. These findings in channel flows suggest new avenues for microfluidic experiments.

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Area of Science:

  • Fluid dynamics
  • Soft matter physics
  • Continuum mechanics

Background:

  • Nematic particles exhibit unique behaviors in flow.
  • Understanding particle deformability is crucial for predicting flow dynamics.

Purpose of the Study:

  • To model and analyze channel flows of deformable nematic particles.
  • To investigate the impact of particle deformability on flow patterns.

Main Methods:

  • Continuum modeling of deformable nematic particles.
  • Analysis of simple shear flow and Poiseuille flow dynamics.
  • Phase space representation to explain steady-state dependencies.

Main Results:

  • Deformability introduces nonlinear coupling between strain rate and vorticity.
  • Observed shape oscillations, flow alignment, and initial condition-dependent steady states.
  • Induced banding in Poiseuille flow with wall-aligned and oscillating central regions.

Conclusions:

  • Particle deformability significantly complicates nematic fluid behavior even in simple flows.
  • The study provides insights into complex dynamics relevant to microfluidics.
  • Results suggest potential for novel microfluidic experimental designs.