Mesoscale study of particle sedimentation with inertia effect using dissipative particle dynamics

Liu, Hantao; Jiang, Shan; Chen, Zhen; Liu, Moubin; Chang, Jianzhong; Yan-hua, Wang; Tong, Zhihui

doi:10.1007/s10404-014-1529-1

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…The present method was used to simulate the work of Liu et al [35], and the sedimentation trajectories of the particles released from different initial positions was shown in the supporting figure S6. It shows all the particles migrated to the channel center, which was in good agreement with the result obtained by Liu et al [35].…”

Section: Modification Of the Conservative Force Coefficientmentioning

confidence: 99%

“…They confirmed that the fluid-particle resistance coefficient C d was directly proportional to the channel blockage ratio. Liu et al [35] altered the DPD weighted function and chose frozen DPD particles for the sphere and the wall. They compared the resistance coefficient of the frozen sphere to classical theory, and achieved consistent results in the simulation of sedimentation.…”

Section: Introductionmentioning

confidence: 99%

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An improved dissipative particle dynamics method for the liquid-particle two-phase flow in microchannels

Dong,

Wu,

Fan

et al. 2023

J. Micromech. Microeng.

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Liquid-particle two-phase flow in microchannel widely exists in the fields of biomedical and environmental monitoring, such as the lab-chip device for disease diagnosis. The standard dissipative particle dynamics (DPD) method has been previously employed to study the liquid-particle two-phase flow in microchannel, but it can not accurately simulate the real process because of the unsuitable DPD parameters. In the present study, an improved DPD method was developed by changing the system energy and fitting the characteristic curve between the random force coefficient and the Schmidt number. In addition, a new logarithmic relationship between the conservative force coefficient and the particle size was found. The result demonstrated that the improved DPD method enabled more accurate simulation on the liquid-particle two-phase flow in microchannels than the standard DPD method. For instance, in the simulation of particle sedimentation, the relative deviation between the value obtained by the improved DPD method and the theorical value was less than 6% while the relative deviation was more than 20% for the standard DPD method. The simulated result of the particle migration in microchannel was in good agreement with the result obtained by Matas et al., and the relative deviation was less than 1.5%. Therefore, the improved DPD method would have great potentials in the study on the liquid-particle two-phase flow in microchannels.

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Section: Modification Of the Conservative Force Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An improved dissipative particle dynamics method for the liquid-particle two-phase flow in microchannels

Dong,

Wu,

Fan

et al. 2023

J. Micromech. Microeng.

View full text Add to dashboard Cite

show abstract

“…LB method has simple algorithm and high calculation efficiency, and can simulate various complex nonlinear macroscopic phenomena. The DPD method combines the advantages of molecular dynamics and lattice Boltzmann method to study the particle flow problem at the mesoscopic level through coarsening, which not only considers the interaction between particles, but also saves computing resources and improves computing efficiency [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of the internal structure of straight microchannels on inertial transport behavior of particles

Dong,

Huang,

Zhao

2024

Heliyon

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“…In recent years, as the small-scale technologies developed fast, DPD has attracted increasing attention, and its applications have been rapidly extended to various research fields. These applications include colloidal suspension [39], liquid-liquid two-phase flow [40], gasliquid two-phase flow [41], electroosmotic flow [42], liquid nanojets [43], solid-liquid interactions [44], particle sedimentation [45], blood flow [46], colloid transport in porous media [47], oil-in-water emulsion [48], magnetorheological fluids [49], etc. In contrast to these aspects, the applications of DPD in polymer systems are more extensive, such as polymer solutions [50], macromolecular suspension [51,52], topological entanglements in polymer melts [53,54], the phase behavior of polymer melts [55], the scaling behavior of polymers [56], and so on.…”

Section: Introductionmentioning

confidence: 99%

Research on the Mesoscopic Characteristics of Kelvin–Helmholtz Instability in Polymer Fluids with Dissipative Particle Dynamics

Wang

et al. 2023

Processes

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In this paper, the two-dimensional Kelvin–Helmholtz (KH) instability occurring in the shear flow of polymer fluids is modeled by the dissipative particle dynamics (DPD) method at the coarse-grained molecular level. A revised FENE model is proposed to properly describe the polymer chains. In this revised model, the elastic repulsion and tension are both considered between the adjacent beads, the bond length of which is set as one segment’s equilibrium length. The entanglements between polymer chains are described with a bead repulsive potential. The characteristics of such a KH instability in polymer fluid shear flow can be successfully captured in the simulations by the use of the modified FENE model. The numerical results show that the waves and vortexes grow more slowly in the shear flow of the polymer fluids than in the Newtonian fluid case, these vortexes become flat, and the polymer impedes the mixing of fluids and inhibits the generation of turbulence. The effects of the polymer concentration, chain length, and extensibility are also investigated regarding the evolution of KH instability. It is shown that the mixing of two polymer fluids reduces, and the KH instability becomes more suppressed as the polymer concentration increases. The vortexes become much longer with the evolution of the elongated interface as the chain length turns longer. As the extensibility increases, the vortexes become more flattened. Moreover, the roll-up process is significantly suppressed if the polymer has sufficiently high extensibility. These observations show that the polymer and its properties significantly influence the formation and evolution of the coherent structures such as the waves and vortexes in the KH instability progress.

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Mesoscale study of particle sedimentation with inertia effect using dissipative particle dynamics

Cited by 12 publications

References 24 publications

An improved dissipative particle dynamics method for the liquid-particle two-phase flow in microchannels

An improved dissipative particle dynamics method for the liquid-particle two-phase flow in microchannels

Influence of the internal structure of straight microchannels on inertial transport behavior of particles

Research on the Mesoscopic Characteristics of Kelvin–Helmholtz Instability in Polymer Fluids with Dissipative Particle Dynamics

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