Coarse-graining, compressibility, and thermal fluctuation scaling in dissipative particle dynamics employed with pre-determined input parameters
Article
Article Title | Coarse-graining, compressibility, and thermal fluctuation scaling in dissipative particle dynamics employed with pre-determined input parameters |
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ERA Journal ID | 1298 |
Article Category | Article |
Authors | Mai-Duy, N. (Author), Phan-Thien, N. (Author), Nguyen, T. Y. N. (Author) and Tran-Cong, T. (Author) |
Journal Title | Physics of Fluids |
Journal Citation | 32 (5) |
Article Number | 053313 |
Number of Pages | 16 |
Year | 2020 |
Publisher | AIP Publishing |
Place of Publication | United States |
ISSN | 1070-6631 |
1089-7666 | |
Digital Object Identifier (DOI) | https://doi.org/10.1063/5.0010275 |
Web Address (URL) | https://pubs.aip.org/aip/pof/article-abstract/32/5/053313/1033625/Coarse-graining-compressibility-and-thermal?redirectedFrom=fulltext |
Abstract | In this study, a Dissipative Particle Dynamics (DPD) method is employed with its input parameters directly determined from the fluid properties, such as the fluid mass density, water compressibility, and viscosity. The investigation of thermal fluctuation scaling requires constant fluid properties, and this proposed DPD version meets this requirement. Its numerical verifications in simple or complex fluids under viscometric or non-viscometric flows indicate that (i) the level of thermal fluctuations in the DPD model for both types of fluids is consistently reduced with an increase in the coarse-graining level and (ii) viscometric or non-viscometric flows of a model fluid at different coarse-graining levels have a similar behavior. Furthermore, to reduce the compressibility effect of the DPD fluid in simulating incompressible flows, a new simple treatment is presented and shown to be very effective. |
Keywords | compressibility effects; dissipative particle dynamics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 490303. Numerical solution of differential and integral equations |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Physics of Fluids 32, 053313 (2020) and may be found at https://doi.org/10.1063/5.0010275. |
Byline Affiliations | School of Mechanical and Electrical Engineering |
National University of Singapore | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5z9y/coarse-graining-compressibility-and-thermal-fluctuation-scaling-in-dissipative-particle-dynamics-employed-with-pre-determined-input-parameters
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