Dissipative particle dynamics: Bridging the gap between atomistic and mesoscopic simulation
- 15 September 1997
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 107 (11), 4423-4435
- https://doi.org/10.1063/1.474784
Abstract
We critically review dissipative particle dynamics (DPD) as a mesoscopic simulation method. We have established useful parameter ranges for simulations, and have made a link between these parameters and χ -parameters in Flory-Huggins-type models. This is possible because the equation of state of the DPD fluid is essentially quadratic in density. This link opens the way to do large scale simulations, effectively describing millions of atoms, by firstly performing simulations of molecular fragments retaining all atomistic details to derive χ -parameters, then secondly using these results as input to a DPD simulation to study the formation of micelles, networks, mesophases and so forth. As an example application, we have calculated the interfacial tension σ between homopolymer melts as a function of χ and N and have found a universal scaling collapse when σ/ρk B Tχ 0.4 is plotted against χN for N>1 . We also discuss the use of DPD to simulate the dynamics of mesoscopic systems, and indicate a possible problem with the timescale separation between particle diffusion and momentum diffusion(viscosity).Keywords
This publication has 23 references indexed in Scilit:
- Fokker-Planck-Boltzmann equation for dissipative particle dynamicsEurophysics Letters, 1997
- Spinodal Decomposition to a Lamellar Phase: Effects of Hydrodynamic FlowPhysical Review Letters, 1997
- Molecular theory of strain hardening of a polymer gel: Application to gelatinThe Journal of Chemical Physics, 1996
- Dynamic Viscoelastic Modulus of Associative Polymer Networks: Off-Lattice Simulations, Theory and Comparison to ExperimentsMacromolecules, 1995
- Accelerated equilibration of polymer melts by time-coarse-grainingThe Journal of Chemical Physics, 1995
- Computer simulation of dilute polymer solutions with the dissipative particle dynamics methodJournal of Rheology, 1995
- Dynamic density functional theory for microphase separation kinetics of block copolymer meltsThe Journal of Chemical Physics, 1993
- Self-consistent theory of a charged multimembrane systemLangmuir, 1992
- Block Copolymer Thermodynamics: Theory and ExperimentAnnual Review of Physical Chemistry, 1990
- Theory of inhomogeneous polymers: Lattice model for polymer–polymer interfacesThe Journal of Chemical Physics, 1975