Lattice-Boltzmann hydrodynamics of anisotropic active matter
A plethora of active matter models exist that describe the behavior of self-propelled particles (or swimmers), both with and without hydrodynamics. However, there are few studies that consider shape-anisotropic swimmers and include hydrodynamic interactions. Here, we introduce a simple method to sim...
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| Veröffentlicht in: | The Journal of chemical physics 2016-04, Vol.144 (13), p.134106-134106 |
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| container_end_page | 134106 |
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| container_issue | 13 |
| container_start_page | 134106 |
| container_title | The Journal of chemical physics |
| container_volume | 144 |
| creator | de Graaf, Joost Menke, Henri Mathijssen, Arnold J. T. M. Fabritius, Marc Holm, Christian Shendruk, Tyler N. |
| description | A plethora of active matter models exist that describe the behavior of self-propelled particles (or swimmers), both with and without hydrodynamics. However, there are few studies that consider shape-anisotropic swimmers and include hydrodynamic interactions. Here, we introduce a simple method to simulate self-propelled colloids interacting hydrodynamically in a viscous medium using the lattice-Boltzmann technique. Our model is based on raspberry-type viscous coupling and a force/counter-force formalism, which ensures that the system is force free. We consider several anisotropic shapes and characterize their hydrodynamic multipolar flow field. We demonstrate that shape-anisotropy can lead to the presence of a strong quadrupole and octupole moments, in addition to the principle dipole moment. The ability to simulate and characterize these higher-order moments will prove crucial for understanding the behavior of model swimmers in confining geometries. |
| doi_str_mv | 10.1063/1.4944962 |
| format | Article |
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| ispartof | The Journal of chemical physics, 2016-04, Vol.144 (13), p.134106-134106 |
| issn | 0021-9606 1089-7690 |
| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Anisotropy Computational fluid dynamics Computer simulation Confining Dipole moments Fluid flow Fluid mechanics Hydrodynamics Quadrupoles Scandals |
| title | Lattice-Boltzmann hydrodynamics of anisotropic active matter |
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