https://doi.org/10.1140/epjp/s13360-021-01599-2
Regular Article
The study of Plateau–Rayleigh instability with DPD
1
State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, 810016, Xining, China
2
Department of Computer Technology and Application, Qinghai University, 810016, Xining, China
3
Teaching and Research Department of Basic Courses, Qinghai University, 810016, Xining, China
4
School of Ecological and Environmental Engineering, Qinghai University, 810016, Xining, China
5
School of Civil Engineering, Qinghai University, 810016, Xining, China
Received:
10
February
2021
Accepted:
21
May
2021
Published online:
10
June
2021
In this paper, the Plateau–Rayleigh (PR) instability that occurs in the two-phase fluids is numerically investigated with dissipative particle dynamics (DPD) method at the mesoscale particle level. For modeling two-phase fluid, the “color” repulsion model is applied to depict binary fluids according to Rothman–Keller method. The present DPD simulation can reproduce the dynamics behaviors of PR instability. Moreover, we research the influence of the ratio of width and length of the liquid column on the PR instability. The results show that the number of droplets formed due to the PR instability increases as the ratio decreases, which is linear relationship within a certain range. Furthermore, some small-scale characteristics, which are difficult to be captured in macroscopic numerical simulation, can be observed by the DPD simulation.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
