Cross-scale numerical simulations using discrete particle models

W. Dzwinel, W. Alda, D. A. Yuen

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We propose a concept for a homogenous computational model in carrying out cross-scale numerical experiments on liquids. The model employs the particle paradigm and comprises three types of simulation techniques: molecular dynamics (MD), dissipative particle dynamics (DPD) and smoothed particle hydrodynamics (SPH). With respect to the definition of the collision operator, this model may work in different hierarchical spatial and time scales as: MD in the atomistic scale, DPD in the mesoscale and SPH in the macroscale. The optimal computational efficiency of the three types of cross-scale experiments are estimated in dependence on: the system size N-where N is the number of particles - and the number of processors P employed for computer simulation. For the three-hierarchical-stage, as embodied in the MD-DPD-SPH model, the efficiency is proportional to N 8/7 but its dependence on P is different for each of the three types of cross-scale experiments. The problem of matching the different scales is discussed.

Original languageEnglish (US)
Pages (from-to)397-418
Number of pages22
JournalMolecular Simulation
Volume22
Issue number6
DOIs
StatePublished - Jan 1 1999

Keywords

  • Cross-scale simulations
  • Dissipative particle dynamics
  • Molecular dynamics
  • Parallel implementation
  • Smoothed particle dynamics

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