Results 21 to 30 of about 41,401 (289)
Chemotaxis of Cargo-Carrying Self-Propelled Particles [PDF]
Physical Review Letters, 2021 Active particles with their characteristic feature of self-propulsion are regarded as the simplest models for motility in living systems. The accumulation of active particles in low activity regions has led to the general belief that chemotaxis requires additional features and at least a minimal ability to process information and to control motion.
Vuijk, Hidde D. +4 more
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Deformable Self-Propelled Particles [PDF]
Physical Review Letters, 2009 A theory of self-propelled particles is developed in two dimensions assuming that the particles can be deformed from a circular shape when the propagating velocity is increased. A coupled set of equations in terms of the velocity and a tensor variable to represent the deformation is introduced to show that there is a bifurcation from a straight motion ...
Ohta, Takao, Ohkuma, Takahiro
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Brownian motion of a self-propelled particle [PDF]
Journal of Physics: Condensed Matter, 2011 Overdamped Brownian motion of a self-propelled particle is studied by solving the Langevin equation analytically. On top of translational and rotational diffusion, in the context of the presented model, the "active" particle is driven along its internal orientation axis.
Hagen, Borge ten +2 more
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Crystallization in a Dense Suspension of Self-Propelled Particles [PDF]
Physical Review Letters, 2012 Using Brownian dynamics computer simulations we show that a two-dimensional suspension of self-propelled ("active") colloidal particles crystallizes at sufficiently high densities. Compared to the equilibrium freezing of passive particles the freezing density is both significantly shifted and depends on the structural or dynamical criterion employed ...
Bialké, Julian +2 more
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Fluctuations and pattern formation in self-propelled particles [PDF]
Physical Review E, 2010 We consider a coarse-grained description of a system of self-propelled particles given by hydrodynamic equations for the density and polarization fields. We find that the ordered moving or flocking state of the system is unstable to spatial fluctuations beyond a threshold set by the self-propulsion velocity of the individual units.
Mishra, Shradha +2 more
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Density-independent model of self-propelled particles [PDF]
Physical Review E, 2013 We examine a density-independent modification of the Vicsek model in which a particle interacts with neighbors defined by Delaunay triangulation. To feasibly simulate the model, an algorithm for repairing the triangulation over time was developed. This algorithm may also be applied to any time-varying two-dimensional Delaunay triangulation.
Schubring, Daniel, Ohmann, Paul R.
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Self-propelled particles with inhomogeneous activity
, 2022 Movement is an essential feature of life. It allows organisms to move towards a more favorable environment and to search for food. There are many biological systems that fall under the category active matter, from molecular motors walking on microtubules inside cells to flocks of birds. What these systems have in common is that each of its constituents
Vuijk, Hidde Derk
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Escape problem for active particles confined to a disk
Physical Review Research, 2020 We study the escape problem for interacting, self-propelled particles confined to a disk, where particles can exit through one open slot on the circumference.
Kristian Stølevik Olsen +2 more
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A Review on the Some Issues of Multiphase Flow with Self-Driven Particles
Applied Sciences, 2021 Multiphase flow with self-driven particles is ubiquitous and complex. Exploring the flow properties has both important academic meaning and engineering value.
Chen Liu, Jianzhong Lin
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Dynamics of a Self-Propelled Particle in a Harmonic Trap [PDF]
Physical Review Letters, 2019 The dynamics of an active walker in a harmonic potential is studied experimentally, numerically and theoretically. At odds with usual models of self-propelled particles, we identify two dynamical states for which the particle condensates at finite distance from the trap center.
Dauchot, Olivier, Démery, Vincent
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