Numerical investigations on the compressibility of a DPD fluid
Article
Article Title | Numerical investigations on the compressibility of a DPD fluid |
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ERA Journal ID | 35103 |
Article Category | Article |
Authors | Pan, Dingyi (Author), Phan-Thien, Nhan (Author), Mai-Duy, Nam (Author) and Khoo, Boo Cheong (Author) |
Journal Title | Journal of Computational Physics |
Journal Citation | 242, pp. 196-210 |
Number of Pages | 15 |
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.2013.02.013 |
Abstract | The compressibility of a dissipative particle dynamics (DPD) fluid is studied numerically through several newly developed test models, where both the density and the divergence of the velocity field are considered. In the case of zero conservative force, the DPD fluid turns out to be compressible. Effects of the compressibility are observed to be reduced as the particle mass is chosen to be smaller and the system temperature to be higher. In the case of non-zero conservative force, the condition of constant density and divergence-free of velocity can be approximately achieved at large values of the repulsion parameter (i.e., weakly compressible flow). Futhermore, the speed of sound and local Mach number are computed and found to be in good agreement with the theoretical estimation. |
Keywords | dissipative particle dynamics; compressibility; bulk viscosity; speed of sound |
ANZSRC Field of Research 2020 | 510703. Particle physics |
401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics) | |
401299. Fluid mechanics and thermal engineering not elsewhere classified | |
Public Notes | © 2013 Elsevier Inc. Published version restricted in accordance with publisher copyright policy. |
Byline Affiliations | National University of Singapore |
Computational Engineering and Science Research Centre | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q25qq/numerical-investigations-on-the-compressibility-of-a-dpd-fluid
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