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- W2007674009 abstract "A model system for classical fluids out of equilibrium, referred to as DPD solid (Dissipative Particles Dynamics), is studied by analytical and simulation methods. The time evolution of a DPD particle is described by a fluctuating heat equation. This DPD solid with transport based on collisional transfer (high density mechanism) is complementary to the Lorentz gas with only kinetic transport (low density mechanism). Combination of both models covers the qualitative behavior of transport properties of classical fluids over the full density range. The heat diffusivity is calculated using a mean field theory, leading to a linear density dependence of this transport coefficient, which is exact at high densities. Subleading density corrections are obtained as well. At lower densities the model has a conductivity threshold below which heat conduction is absent. The observed threshold is explained in terms of percolation diffusion on a random proximity network. The geometrical structure of this network is the same as in continuum percolation of completely overlapping spheres, but the dynamics on this network differs from continuum percolation diffusion. Furthermore, the kinetic theory for DPD is extended to the generalized hydrodynamic regime, where the wave number dependent decay rates of the Fourier modes of the energy and temperature fields are calculated." @default.
- W2007674009 created "2016-06-24" @default.
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- W2007674009 date "2005-04-12" @default.
- W2007674009 modified "2023-10-14" @default.
- W2007674009 title "Model system for classical fluids out of equilibrium" @default.
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- W2007674009 doi "https://doi.org/10.1103/physreve.71.041104" @default.
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