Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description
We introduce a framework for model reduction of polymer chain models for dissipative particle dynamics (DPD) simulations, where the properties governing the phase equilibria such as the characteristic size of the chain, compressibility, density, and temperature are preserved. The proposed methodolog...
| Main Authors: | , , |
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| Format: | Journal Article |
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Elsevier BV
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/51601 |
| _version_ | 1848758738009194496 |
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| author | Moreno, N. Nunes, S. Calo, Victor |
| author_facet | Moreno, N. Nunes, S. Calo, Victor |
| author_sort | Moreno, N. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We introduce a framework for model reduction of polymer chain models for dissipative particle dynamics (DPD) simulations, where the properties governing the phase equilibria such as the characteristic size of the chain, compressibility, density, and temperature are preserved. The proposed methodology reduces the number of degrees of freedom required in traditional DPD representations to model equilibrium properties of systems with complex molecules (e.g. linear polymers). Based on geometrical considerations we explicitly account for the correlation between beads in fine-grained DPD models and consistently represent the effect of these correlations in a reduced model, in a practical and simple fashion via power laws and the consistent scaling of the simulation parameters. In order to satisfy the geometrical constraints in the reduced model we introduce bond–angle potentials that account for the changes in the chain free energy after the model reduction. Following this coarse-graining process we represent high molecular weight DPD chains (i.e. ≥200 beads per chain) with a significant reduction in the number of particles required (i.e. ≥20 times the original system). We show that our methodology has potential applications modeling systems of high molecular weight molecules at large scales, such as diblock copolymer and DNA. |
| first_indexed | 2025-11-14T09:48:45Z |
| format | Journal Article |
| id | curtin-20.500.11937-51601 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:48:45Z |
| publishDate | 2015 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-516012017-09-13T15:48:31Z Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description Moreno, N. Nunes, S. Calo, Victor We introduce a framework for model reduction of polymer chain models for dissipative particle dynamics (DPD) simulations, where the properties governing the phase equilibria such as the characteristic size of the chain, compressibility, density, and temperature are preserved. The proposed methodology reduces the number of degrees of freedom required in traditional DPD representations to model equilibrium properties of systems with complex molecules (e.g. linear polymers). Based on geometrical considerations we explicitly account for the correlation between beads in fine-grained DPD models and consistently represent the effect of these correlations in a reduced model, in a practical and simple fashion via power laws and the consistent scaling of the simulation parameters. In order to satisfy the geometrical constraints in the reduced model we introduce bond–angle potentials that account for the changes in the chain free energy after the model reduction. Following this coarse-graining process we represent high molecular weight DPD chains (i.e. ≥200 beads per chain) with a significant reduction in the number of particles required (i.e. ≥20 times the original system). We show that our methodology has potential applications modeling systems of high molecular weight molecules at large scales, such as diblock copolymer and DNA. 2015 Journal Article http://hdl.handle.net/20.500.11937/51601 10.1016/j.cpc.2015.06.012 Elsevier BV fulltext |
| spellingShingle | Moreno, N. Nunes, S. Calo, Victor Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description |
| title | Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description |
| title_full | Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description |
| title_fullStr | Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description |
| title_full_unstemmed | Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description |
| title_short | Consistent model reduction of polymer chains in solution in dissipative particle dynamics: Model description |
| title_sort | consistent model reduction of polymer chains in solution in dissipative particle dynamics: model description |
| url | http://hdl.handle.net/20.500.11937/51601 |