Relaxation and contact angle dynamics during the coalescence of different sized vertically aligned water drops in different silicone oil viscosities

Brik, Mostafa; Harmand, Souad; Zaaroura, Ibrahim

doi:10.1016/j.colsurfa.2021.127429

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…water or polymer droplets. 6–30 From the point of view of numerical simulations, these have by and large provided descriptions of the macroscopic and dynamic properties of coalescence, 7,8,20–22,31–33 but they generally continue to suffer from inadequate resolution at the pinching point between droplets at the initial stage of coalescence, despite progress in this area. 12 Moreover, a detailed molecular-level description of the mass transport mechanism of surfactant is beyond the reach of any continuum model.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of the coalescence of surfactant-laden droplets

Arbabi,

Deuar,

Denys

et al. 2023

Soft Matter

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Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of the coalescence of surfactant-laden droplets

Arbabi,

Deuar,

Denys

et al. 2023

Soft Matter

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“…Many natural phenomena involve the coalescence of fluid droplets. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] For example, this is a fundamental process that determines the distribution and coalescence rate of raindrops in atmospheric aerosols. [21][22][23][24] Apart from such natural processes, droplet coalescence is relevant for many industrial applications as well, such as inkjet printing, 25 microfluidics, [26][27][28][29] and water treatment during crude oil and natural gas separation.…”

Section: Introductionmentioning

confidence: 99%

Coalescence of surfactant-laden droplets

et al. 2023

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Droplet coalescence is an important process in nature and various technologies (e.g., inkjet printing). Here, we unveil the surfactant mass transport mechanism and report on several major differences in the coalescence of surfactant-laden droplets as compared to pure water droplets by means of molecular dynamics simulation of a coarse-grained model. Large-scale changes to bridge growth dynamics are identified, such as the lack of multiple thermally excited precursors, attenuated collective excitations after contact, slowing down in the inertial regime due to aggregate-induced rigidity and reduced water flow, and a slowing down in the coalescence rate (deceleration) when surfactant concentration increases, while at the same time, we also confirm the existence of an initial thermal, and a power-law, inertial, regime of the bridge growth dynamics in both the pure and the surfactant-laden droplets. Thus, we unveil the key mechanisms in one of the fundamental topological processes of liquid droplets containing surfactant, which is crucial in relevant technologies.

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Spreading and shrinking behaviors of oil films with different viscosities on a cold immiscible liquid substrate

Liu

Wang

et al. 2022

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Relaxation and contact angle dynamics during the coalescence of different sized vertically aligned water drops in different silicone oil viscosities

Cited by 5 publications

References 32 publications

Molecular dynamics simulation of the coalescence of surfactant-laden droplets

Molecular dynamics simulation of the coalescence of surfactant-laden droplets

Coalescence of surfactant-laden droplets

Spreading and shrinking behaviors of oil films with different viscosities on a cold immiscible liquid substrate

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