Influence of the conservative force on transport coefficients in the DPD method

The transport coefficients of a dissipative particle dynamics system are investigated numerically taking into account the conservative force. The influence of the conservative force parameter on kinetic and dissipative viscosity is considered and compared with theoretical predictions. The analytical...

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Bibliographic Details
Published in:Molecular simulation 2018-02, Vol.44 (3), p.254-261
Main Authors: Zohravi, Elnaz, Shirani, Ebrahim, Pishevar, Ahmadreza
Format: Article
Language:English
Subjects:
conservative force
Dissipation
Dissipative particle dynamics
self-diffusion coefficient
transport coefficient
Transport properties
Viscosity
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Summary:The transport coefficients of a dissipative particle dynamics system are investigated numerically taking into account the conservative force. The influence of the conservative force parameter on kinetic and dissipative viscosity is considered and compared with theoretical predictions. The analytical solution of the potential term that arises from the conservative force is generally very complicated; therefore, this term has been ignored in most previous work and deemed negligible. In the present work, an expression for the effect of the conservative force on potential viscosity is semi-empirically obtained revealing the dependence of the latter on various parameters such as conservative force strength, density number and temperature. This relation offers a proper approximation of conservative force impact on potential viscosity.
ISSN:0892-7022
1029-0435
DOI:10.1080/08927022.2017.1373193