Orientational order and topological defects in a dilute solutions of rodlike polymers at low Reynolds number
arXiv:2312.16873 · doi:10.1103/PhysRevE.110.015104
Abstract
The relationship between the polymer orientation and the chaotic flow, in a dilute solution of rigid rodlike polymers at low Reynolds number, is investigated by means of direct numerical simulations. It is found that the rods tend to align with the velocity field in order to minimize the friction with the solvent fluid, while regions of rotational disorder are related to strong vorticity gradients, and therefore to the chaotic flow. The "turbulent-like" behavior of the system is therefore associated with the emergence and interaction of topological defects of the mean director field, similarly to active nematic turbulence. The analysis has been carried out in both two and three spatial dimensions.
arXiv comment12 pages, 15 figures
References in corpus (28)
- Spontaneous motion in hierarchically assembled active matter
- Elastic turbulence in a polymer solution flow
- Efficient Mixing at low Reynolds numbers using polymer additives
- Defect annihilation and proliferation in active nematics
- Active Turbulence
- Elastic turbulence in curvilinear flows of polymer solutions
- Defect dynamics in active nematics
- Topological structure and dynamics of three dimensional active nematics
- Turbulent dynamics of epithelial cell cultures
- Spectra of turbulence in dilute polymer solutions
- Colloquium: Theory of Drag Reduction by Polymers in Wall Bounded Turbulence
- Instabilities and Topological Defects in Active Nematics
- Mesoscopic Turbulence and Local Order in Janus Particles Self-Propelling under an AC Electric Field
- Vorticity, Defects and Correlations in Active Turbulence
- Two-dimensional elastic turbulence
- Elastic waves and transition to elastic turbulence in a two-dimensional viscoelastic Kolmogorov flow
- Exact tensor closures for the three dimensional Jeffery's equation
- Topology of three-dimensional active nematic turbulence confined to droplets
- Elastic turbulence in two-dimensional Taylor-Couette flows
- Turbulent channel without boundaries: The periodic Kolmogorov flow
- Spectral energy analysis of bulk three-dimensional active nematic turbulence
- Additive Equivalence in Turbulent Drag Reduction by Flexible and Rodlike Polymers
- Comparison of Theory and Direct Numerical Simulations of Drag Reduction by Rodlike Polymers in Turbulent Channel Flows
- Defect Line Coarsening and Refinement in Active Nematics
- Drag enhancement in a dusty Kolmogorov flow
- Emergence of chaos in a viscous solution of rods
- Topological Phases and Curvature-Driven Pattern Formation in Cholesteric Shells
- Turbulent Drag Reduction by Flexible and Rodlike Polymers: Crossover Effects at Small Concentrations