Crossover behavior study of a thinning liquid bridge using the dissipative particle dynamics method

Mo, Chaojie; Li-zi, Qin; Yang, Lijun

doi:10.1016/j.compfluid.2017.08.038

Computers & Fluids

2017

DOI: 10.1016/j.compfluid.2017.08.038

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Crossover behavior study of a thinning liquid bridge using the dissipative particle dynamics method

Chaojie Mo

Qin Li-zi

Lijun Yang

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Cited by 3 publications

References 28 publications

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Molecular dynamics simulation of a nanoscale feedback-free fluidic oscillator

Zhang

et al. 2017

AIP Advances

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We present a molecular dynamics simulation study of a feedback-free fluidic oscillator model. Using the molecular dynamics simulations, it is demonstrated that the oscillation can be self-induced and sustained in a large range of flow rate and two very different jet directions. The oscillation mechanism of the nanoscale fluidic oscillator is physically similar to that in macroscale in which the dome vortex plays a crucial role. The thermal fluctuation is not significant enough to submerged the effect of hydrodynamics in the nanoscale feedback-free fluidic oscillator. The linear relationship between the oscillation frequency and the flow rate revealed by macroscopic experiments was also found in our simulations. Two of the three oscillation regimes found in macroscopic studies are shown to be able to be reproduced in our simulation. Our results show that molecular dynamics simulation is fully capable of studying the complicated flow in a feedback-free fluidic oscillator.

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Molecular dynamics simulation of a nanoscale feedback-free fluidic oscillator

Zhang

et al. 2017

AIP Advances

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Influence of thermal fluctuations on nanoscale free-surface flows: A many-body dissipative particle dynamics study

Zhao

et al. 2021

Physics of Fluids

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Rupture process of liquid bridges: The effects of thermal fluctuations

et al. 2020

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Rupture of a liquid bridge is a complex dynamic process, which has attracted much attention over several decades. We numerically investigated the effects of the thermal fluctuations on the rupture process of liquid bridges by using a particle-based method know as many-body dissipative particle dynamics. After providing a comparison of growth rate with the classical linear stability theory, the complete process of thinning liquid bridges is captured. The transitions among the inertial regime (I), the viscous regime (V), and the viscous-inertial regime (VI) with different liquid properties are found in agreement with previous work. A detailed description of the thermal fluctuation regime (TF) and another regime, named the breakup regime, are proposed in the present study. The full trajectories of thinning liquid bridges are summarized as I → V → VI → TF → breakup for low-Oh liquids and V → I → Intermediate → V → VI → TF → breakup for high-Oh liquids, respectively. Moreover, the effects of the thermal fluctuations on the formation of satellite drops are also investigated. The distance between the peaks of axial velocity is believed to play an important role in forming satellite drops. The strong thermal fluctuations smooth the distribution of axial velocity and change the liquid bridge shape into a double cone without generating satellite drops for low-Oh liquids, while for high-Oh liquids, this distance is extended and a large satellite drop is formed after the breakup of the liquid filament occurs on both ends, which might be due to strong thermal fluctuations. This work can provide insights on the rupture mechanism of liquid bridges and be helpful for designing superfine nanoprinting.

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Crossover behavior study of a thinning liquid bridge using the dissipative particle dynamics method

Cited by 3 publications

References 28 publications

Molecular dynamics simulation of a nanoscale feedback-free fluidic oscillator

Molecular dynamics simulation of a nanoscale feedback-free fluidic oscillator

Influence of thermal fluctuations on nanoscale free-surface flows: A many-body dissipative particle dynamics study

Rupture process of liquid bridges: The effects of thermal fluctuations

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