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- W3100295207 abstract "We introduce new Langevin-type equations describing the rotational and translational motion of rigid bodies interacting through conservative and non-conservative forces and hydrodynamic coupling. In the absence of non-conservative forces, the Langevin-type equations sample from the canonical ensemble. The rotational degrees of freedom are described using quaternions, the lengths of which are exactly preserved by the stochastic dynamics. For the proposed Langevin-type equations, we construct a weak 2nd order geometric integrator that preserves the main geometric features of the continuous dynamics. The integrator uses Verlet-type splitting for the deterministic part of Langevin equations appropriately combined with an exactly integrated Ornstein-Uhlenbeck process. Numerical experiments are presented to illustrate both the new Langevin model and the numerical method for it, as well as to demonstrate how inertia and the coupling of rotational and translational motion can introduce qualitatively distinct behaviours." @default.
- W3100295207 created "2020-11-23" @default.
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- W3100295207 date "2017-12-12" @default.
- W3100295207 modified "2023-10-18" @default.
- W3100295207 title "Geometric integrator for Langevin systems with quaternion-based rotational degrees of freedom and hydrodynamic interactions" @default.
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- W3100295207 doi "https://doi.org/10.1063/1.4999771" @default.
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