A discretized integral hydrodynamics

Details A discretized integral hydrodynamics A discretized integral hydrodynamics

1997-12-19

arxiv.org/abs/cond-mat/9712244v1

Physics

Condensed Matter

10 pages, RevTex, submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.58.1843

Using an interpolant form for the gradient of a function of position, we write an integral version of the conservation equations for a fluid. In the appropriate limit, these become the usual conservation laws of mass, momentum and energy. We also discuss the special cases of the Navier-Stokes equations for viscous flow and the Fourier law for thermal conduction in the presence of hydrodynamic fluctuations. By means of a discretization procedure, we show how these equations can give rise to the so-called "particle dynamics" of Smoothed Particle Hydrodynamics and Dissipative Particle Dynamics.

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