Dissipative particle dynamics modeling of low Reynolds number incompressible flows
Article
Article Title | Dissipative particle dynamics modeling of low Reynolds number incompressible flows |
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ERA Journal ID | 5149 |
Article Category | Article |
Authors | Mai-Duy, N. (Author), Pan, D. (Author), Phan-Thien, N. (Author) and Khoo, B. C. (Author) |
Journal Title | Journal of Rheology |
Journal Citation | 57 (2), pp. 585-604 |
Number of Pages | 10 |
Year | 2013 |
Place of Publication | Orono, ME. United States |
ISSN | 0148-6055 |
1520-8516 | |
Digital Object Identifier (DOI) | https://doi.org/10.1122/1.4789444 |
Abstract | This paper is concerned with the numerical modeling of a slow (creeping) flow using a particle-based simulation technique, known as dissipative particle dynamics (DPD), in which the particles' mass is allowed to approach zero to simultaneously achieve a high sonic speed, a low Reynolds number, and a high Schmidt number. This leads to a system of stiff stochastic differential equations, which are solved efficiently by an exponential time differencing (ETD) scheme. The ETD-DPD method is first tested in viscometric flows, where the particle mass is reduced down to 0.001. The method is then applied for the modeling of rigid spheres in a Newtonian fluid by means of two species of DPD particles, one representing the solvent particles and the other, the suspended particle. Calculations are carried out at particle mass of 0.01, with corresponding Mach number of 0.08, Reynolds number of 0.05, and Schmidt number of 6.0 × 103. Stokes results are used to determine the DPD parameters for the solvent-sphere interaction forces. The method obeys equipartition and yields smooth flows around the sphere with quite uniform far-field velocities. |
Keywords | dissipative particle dynamics; equipartition; exponential time differencing; far-field velocity; high Schmidt numbers; interaction forces; low Reynolds number; Newtonian fluids; particle mass; particle-based simulation; rigid sphere; Schmidt numbers; solvent particles; sonic speed; stochastic differential equations; suspended particles; viscometric flows |
ANZSRC Field of Research 2020 | 490510. Stochastic analysis and modelling |
401213. Turbulent flows | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | © 2013 The Society of Rheology. 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/q2683/dissipative-particle-dynamics-modeling-of-low-reynolds-number-incompressible-flows
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