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Continuum-particle hybrid methods for dense fluids

  • Thomas Werder
  • Jens H. Walther
  • Joonas Asikainen
  • Petros Koumoutsakos
Part of the Lecture Notes in Computational Science and Engineering book series (LNCSE, volume 39)

Summary

We outline a hybrid multiscale algorithm for the simulation of dense fluids by coupling molecular dynamics and continuum fluid dynamics, here described by the incompressible Navier-Stokes equations. We estimate the required sampling of the atomistic system to achieve sufficiently accurate boundary condition for the continuum system. This analysis indicate that momentum flux (pressure) tensor requires an intractable number of samples (O(108)), hence penalizing flux based coupling algorithms. For the present systems we therefore employ a density based, alternating Schwarz algorithm to couple the two system. The boundary conditions at the interface between the two regions is imposed by inserting or deleting atoms in a buffer region using the USHER algorithm. Preliminary results indicate, that the forcing of the continuum may be achieved using appropriate source terms in the momentum equations.

Keywords

Fractional Error Continuum Fluid Dynamic Bulk Water System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Thomas Werder
    • 1
  • Jens H. Walther
    • 1
  • Joonas Asikainen
    • 1
  • Petros Koumoutsakos
    • 1
  1. 1.Institute of Computational ScienceETH ZürichZürichSwitzerland

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