Related Experiment Video
Updated: May 27, 2025
08:37
Forming, Confining, and Observing Microtubule-Based Active Nematics
Published on: January 13, 2023
2.6K
Solute dispersion in pre-turbulent confined active nematics
Tomás Alvim1,2, Margarida M Telo da Gama1,2, Rodrigo C V Coelho1,2
1Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal. rcvcoelho@fc.ul.pt.
Soft Matter
|February 18, 2025
Summary
We studied solute dispersion in active nematic fluids within narrow channels. Hydrodynamic dispersion in oscillatory and dancing flows showed similar patterns, extending the Taylor-Aris law for better micromixing understanding.
Area of Science:
- Physics
- Fluid Dynamics
- Soft Matter
Background:
- Active nematic fluids exhibit complex flow behaviors.
- Confined geometries influence fluid dynamics significantly.
- Understanding solute dispersion is crucial for micromixing applications.
Purpose of the Study:
- Investigate solute dispersion in active nematic fluids.
- Analyze behavior in pre-turbulent oscillatory and dancing flow regimes.
- Compare non-diffusive tracer and hydrodynamic dispersion.
Main Methods:
- Simulations of nematohydrodynamics.
- Analysis of oscillatory flow (with net mass flux).
- Analysis of dancing flow (without net flux).
Main Results:
- Non-diffusive tracers behave differently in oscillatory vs. dancing flows.
- Hydrodynamic dispersion is similar in both flow regimes.
- Dispersion can be described by an extended Taylor-Aris law.
Conclusions:
- Active nematic fluid simulations reveal distinct tracer behaviors.
- Hydrodynamic dispersion in confined active flows follows predictable patterns.
- Findings advance understanding of micromixing in active systems.
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