Droplet-particle collision dynamics: A molecular dynamics simulation

Zhan, Lingxiao; Chen, Heng; Zhou, Hao; Chen, Jiawei; Hao, W.; Yang, Linjun

doi:10.1016/j.powtec.2023.118456

Cited by 12 publications

(3 citation statements)

References 54 publications

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“…When the initial velocity is 16 Å/ps, the spreading and fracture of the aggregated droplet co-occur, and the degree of fracture is more intense, presenting an SPFP mode. At the nanoscale, the intense fragmentation of high-velocity droplets impacting solid curved surfaces also appears in Zhan et al Therefore, the initial velocity has a significant impact on the impact mode of the double droplet.…”

Section: Resultsmentioning

confidence: 85%

Molecular Dynamics Simulation of Dual Nanodroplet Impacts on a Cylindrical Surface

Liu,

et al. 2024

Langmuir

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Section: Resultsmentioning

confidence: 85%

Molecular Dynamics Simulation of Dual Nanodroplet Impacts on a Cylindrical Surface

Liu,

et al. 2024

Langmuir

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“…However, the particle size was larger and the dispersion density of the fluorescent particles decreased when increasing the dosage of HO-PDMS to 8% ( Figure 4 d). This result was ascribed to the increase in HO-PDMS intermolecular collision with the excessive HO-PDMS dosage [ 32 ]. It has been demonstrated that this chemical reaction occurred between the Si-OHs in HO-PDMS or the Si-OH and other active functional groups in asphalt from the result of FT-IR, 1 H-NMR, and GPC.…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Polysiloxane-Modified Asphalt Binder Exhibiting Enhanced Performance

Qian,

Dong,

Chen

et al. 2023

Polymers

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The development of polymer-modified asphalt (asphalt = asphalt binder) is significant because the polymer modifier can improve the performance of asphalt mixture and meet the requirements of the modern asphalt pavement. Herein, we present a novel polysiloxane-modified asphalt with enhanced performance, formed by simply mixing hydroxy-terminated polysiloxane (HO-PDMS) into base asphalt at 140 °C. The interaction mechanism of HO-PDMS in base asphalt was characterized by FT-IR, GPC, and DSC. It reveals that HO-PDMS polymers have been chemically bonded into the asphalt, and, thus, the resultant asphalt exhibits optimal compatibility and storage stability. The results based on fluorescence microscopy and a segregation test prove that HO-PDMS has good compatibility with base asphalt. Moreover, by virtue of the intriguing properties of polysiloxane, the present asphalt possesses improved low- and high-temperature properties, higher thermal stability, and enhanced hydrophobicity compared to conventional asphalt when using an appropriate dosage of HO-PDMS. DSC indicated that the Tg of modified asphalt (−12.8 °C) was obviously lower than that of base asphalt (−7.1 °C). DSR shows that the rutting parameter of modified asphalt was obviously higher than that of base asphalt. BBR shows that modified asphalt exhibited the lowest stiffness modulus and the highest creep rate with an HO-PDMS dosage of 6% and 4%, respectively. These results demonstrate that polysiloxane-modified asphalt can be promisingly utilized in realistic asphalt pavement with specific requirements, particularly high-/low-temperature resistance.

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“…20 The essence of all the above slurry conditioning methods is the collision and adsorption of the particles with the collector, while the essence of the collision and adsorption is drainage under the effect of kinetic energy. [21][22][23] In terms of kinetic energy promoting thinning of the hydration film and drainage, a novel model of adsorption based on thin film drainage, energy, and critical velocity models has been developed with high predictive properties. This model includes an expression for the probability of adsorption and has been tested against multiple bubble pipe flow experiments, demonstrating good agreement with simulation results of rebound or adsorption depending on the collision energy.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in kerosene droplet–coal particle collision and adsorption by bubble trailing vortex in coal slurry conditioning: Energy evolution of collision process

Zhu,

Qin,

Chen

et al. 2024

Asia-Pacific J Chem Eng

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Understanding the collision between kerosene droplets and coal particles in the bubble trailing vortex region is crucial for enhancing slurry conditioning. We found the area of the bubble trailing vortex region increased as the bubble size increased via the Fluent 6.3.26 software. A kerosene droplet velocity range of 0.074–0.106 m/s and a coal particle velocity range of 0.062–0.104 m/s were obtained if a bubble had a diameter of 0.3 mm. We employed a high‐speed motion acquisition system and observed the collision process, which was divided into two stages: Compression and Rebound. The critical motion distance increased as the kerosene droplet size increased, and sufficient kerosene droplet motion distance and enough kinetic energy normally resulted in a rebound phenomenon. The attenuation energy was almost positively linear to the initial energy, and the energy attenuation coefficient of the collision process was fitted to 0.626. Our results can provide valuable insight into mineral separation.

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Droplet-particle collision dynamics: A molecular dynamics simulation

Cited by 12 publications

References 54 publications

Molecular Dynamics Simulation of Dual Nanodroplet Impacts on a Cylindrical Surface

Molecular Dynamics Simulation of Dual Nanodroplet Impacts on a Cylindrical Surface

Facile Preparation of Polysiloxane-Modified Asphalt Binder Exhibiting Enhanced Performance

Enhancement in kerosene droplet–coal particle collision and adsorption by bubble trailing vortex in coal slurry conditioning: Energy evolution of collision process

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