Numerical investigations on the compressibility of a DPD fluid

Pan, Dingyi and Phan-Thien, Nhan and Mai-Duy, Nam and Khoo, Boo Cheong (2013) Numerical investigations on the compressibility of a DPD fluid. Journal of Computational Physics, 242. pp. 196-210. ISSN 0021-9991


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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 Elsevier Inc. Published version restricted in accordance with publisher copyright policy.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 03 May 2014 11:40
Last Modified: 17 Jul 2014 05:12
Uncontrolled Keywords: dissipative particle dynamics; compressibility; bulk viscosity; speed of sound
Fields of Research (2008): 02 Physical Sciences > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020203 Particle Physics
09 Engineering > 0915 Interdisciplinary Engineering > 091501 Computational Fluid Dynamics
09 Engineering > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
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