A numerical study of strongly overdamped dissipative particle dynamics (DPD) systems
Article
Article Title | A numerical study of strongly overdamped dissipative particle dynamics (DPD) systems |
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ERA Journal ID | 35103 |
Article Category | Article |
Authors | Mai-Duy, N. (Author), Phan-Thien, N. (Author) and Khoo, B. C. (Author) |
Journal Title | Journal of Computational Physics |
Journal Citation | 245, pp. 150-159 |
Number of Pages | 10 |
Year | 2013 |
Place of Publication | Maryland Heights, MO. United States |
ISSN | 0021-9991 |
1090-2716 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jcp.2013.03.013 |
Abstract | In this paper, we investigate the behaviour of a Dissipative Particle Dynamics (DPD) system in the overdamped limit where the particles approach zero mass limit. In this limit, the DPD system becomes singular. We propose two numerical schemes to deal with this system - one results in a fully-populated but well-conditioned matrix system, while the other employs a deflation technique to handle the system in an iterative manner, where the eigenvalue of -1 corresponding to a rigid-body motion is mapped to zero. The latter iterative scheme is to be preferred, with the possibility of parallel implementations. Some numerical results are presented to verify the two proposed schemes. |
Keywords | deflation; dissipative particle dynamics; overdamped limit; singular matrix; zero-mass system |
ANZSRC Field of Research 2020 | 401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics) |
510703. Particle physics | |
490105. Dynamical systems in applications | |
Public Notes | © 2013 Elsevier Inc. Published version deposited in accordance with the copyright policy of the publisher. |
Byline Affiliations | Computational Engineering and Science Research Centre |
National University of Singapore | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q1yyy/a-numerical-study-of-strongly-overdamped-dissipative-particle-dynamics-dpd-systems
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