2015
DOI: 10.1103/physreve.91.033309
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Bulk viscosity of multiparticle collision dynamics fluids

Abstract: We determine the viscosity parameters of the multiparticle collision dynamics (MPC) approach, a particle-based mesoscale hydrodynamic simulation method for fluids. We perform analytical calculations and verify our results by simulations. The stochastic rotation dynamics and the Andersen thermostat variant of MPC are considered, both with and without angular momentum conservation. As an important result, we find a nonzero bulk viscosity for every MPC version. The explicit calculation shows that the bulk viscosi… Show more

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Cited by 21 publications
(36 citation statements)
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“…We employ the time step h = 0.02 ma 2 /(k B T ) and the mean number of particles in a cell N c = 80, which yields a fluid viscosity of η = 178 mk B T /a 4 , as determined by independent simulations [58]. The resulting Péclet number, which compares the time scale for rotational diffu-…”
Section: Set 1 -High Packing Fraction Small Péclet Numbermentioning
confidence: 99%
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“…We employ the time step h = 0.02 ma 2 /(k B T ) and the mean number of particles in a cell N c = 80, which yields a fluid viscosity of η = 178 mk B T /a 4 , as determined by independent simulations [58]. The resulting Péclet number, which compares the time scale for rotational diffu-…”
Section: Set 1 -High Packing Fraction Small Péclet Numbermentioning
confidence: 99%
“…For this purpose, the simulation volume is partitioned into cubic collision cells of length a. In each of the cells the particle velocities are then updated as [58,77] v new…”
Section: Multiparticle Collision Dynamics (Mpc)mentioning
confidence: 99%
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“…In the collision step, the simulation box is partitioned into cubic collision cells of length a, in which stochastic multiparticle collisions are performed. For these collisions, different approaches have been developed [4,6,[21][22][23]. In the stochastic-rotation-dynamics version (MPC-SRD) [4][5][6], the relative velocity of each particle, with respect to the center-of-mass velocity of the cell, is rotated by a fixed angle α around a randomly oriented axis, independent for each cell, which yields the velocities…”
Section: A Algorithmmentioning
confidence: 99%
“…whereN c represents the average numerical density at collision cells. For MPCD-AT+a, the stress tensor can be written in the form [20]…”
Section: Linearized Hydrodynamicsmentioning
confidence: 99%