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- W3102863406 abstract "Starting from a fine-scale dissipative particle dynamics (DPD) model of self-motile point particles, we derive meso-scale continuum equations by applying a spatial averaging version of the Irving–Kirkwood–Noll procedure. Since the method does not rely on kinetic theory, the derivation is valid for highly concentrated particle systems. Spatial averaging yields stochastic continuum equations similar to those of Toner and Tu. However, our theory also involves a constitutive equation for the average fluctuation force. According to this equation, both the strength and the probability distribution vary with time and position through the effective mass density. The statistics of the fluctuation force also depend on the fine scale dissipative force equation, the physical temperature, and two additional parameters which characterize fluctuation strengths. Although the self-propulsion force entering our DPD model contains no explicit mechanism for aligning the velocities of neighboring particles, our averaged coarse-scale equations include the commonly encountered cubically nonlinear (internal) body force density." @default.
- W3102863406 created "2020-11-23" @default.
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- W3102863406 date "2018-03-01" @default.
- W3102863406 modified "2023-09-26" @default.
- W3102863406 title "Spatial averaging of a dissipative particle dynamics model for active suspensions" @default.
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- W3102863406 doi "https://doi.org/10.1063/1.5024746" @default.
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