Abstract
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.
| Original language | English |
|---|---|
| Article number | 134106 |
| Journal | Journal of Chemical Physics |
| Volume | 144 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 7 Apr 2016 |
Bibliographical note
Funding Information:J.d.G. acknowledges financial support by aNWORubicon Grant (No. #680501210). J.d.G. and C.H. thank the DFG for funding through the SPP 1726 "Microswimmers - From Single Particle Motion to Collective Behavior." A.J.T.M.M. and T.N.S. acknowledge financial support from an ERC Advanced Grant MiCE (No. 291234). T.N.S. thanks EMBO for funding through (No.ALTF181-2013).
Publisher Copyright:
© 2016 AIP Publishing LLC.
Funding
J.d.G. acknowledges financial support by aNWORubicon Grant (No. #680501210). J.d.G. and C.H. thank the DFG for funding through the SPP 1726 "Microswimmers - From Single Particle Motion to Collective Behavior." A.J.T.M.M. and T.N.S. acknowledge financial support from an ERC Advanced Grant MiCE (No. 291234). T.N.S. thanks EMBO for funding through (No.ALTF181-2013).