Effects of the surface wettability of nanoparticles on the impact dynamics of droplets

Hu, Meibing; Zhou, Juying; Li, Yang; Xin, Zhuo; Jing, Dengwei

doi:10.1016/j.ces.2021.116977

Cited by 16 publications

(13 citation statements)

References 38 publications

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“…At the same time, particle deposition at the triple line can change the wettability of the local surface and bring the temporary balance of interfacial tensions at the pinning points, while the disturbance of capillary oscillation can break the balance and lead to depinning . This work provides a new direction to pursue for suppressing the vibration and retraction of droplets as well as offering a powerful means of exploring the mechanism of particle-induced changes to the dynamics of droplet impacts …”

Section: Role Of Nanoparticlesmentioning

confidence: 99%

“…21 This work provides a new direction to pursue for suppressing the vibration and retraction of droplets as well as offering a powerful means of exploring the mechanism of particle-induced changes to the dynamics of droplet impacts. 11 Naturally, the wetting behavior of the nanofluid is also influenced by the interactions at the air−water interface. The influence of nanoparticles on the surface tension has been debated with conflicting reports.…”

Section: ■ Role Of Nanoparticlesmentioning

confidence: 99%

“…(a) Effect of nanoparticles on pinning of a receding droplet . (b) Microscopic images of carbon black particles at an oil–water interface showing the increase in wrinkling with increasing surface compression .…”

Section: Role Of Nanoparticlesmentioning

confidence: 99%

“…In the aforementioned experiments, nanofluids have shown fundamental different spreading and splashing mechanisms in comparison to their base liquids. ,, The presence of nanoparticles has an impact not only on the base fluid characteristics but also on the particle interactions, which is crucial to the nanofluid flow. These parameters are often simplified into an effective viscosity and surface tension for the nanofluid so that they can be incorporated into the two-piece function shown in eq .…”

Section: Role Of Nanoparticlesmentioning

confidence: 99%

“…Naturally, the wetting behavior of the nanofluid is also influenced by the interactions at the air–water interface. The influence of nanoparticles on the surface tension has been debated with conflicting reports. ,,, Hydrophilic particles are commonly believed to have no interfacial activity when dispersed in aqueous base liquids . Even though hydrophobic nanoparticles tend not to stay at the interfaces, Lu et al hypothesized that the attraction forces between them and water molecules near the surface reduce the intermolecular spacing, thus increasing the nanofluid surface tension .…”

Section: Role Of Nanoparticlesmentioning

confidence: 99%

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Role of Nanoparticles in Nanofluid Droplet Impact on Solid Surfaces

et al. 2022

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Splashing of a liquid droplet onto a substrate, while ubiquitous, sits at the intersection of several key fluid mechanical regions. Typically, this problem is often simplified to the transition between spreading and splashing, even for splashing on complex surfaces. Recently, there has been increased interest in using not just pure liquids but also nanofluids in applications such as spray cooling. While the addition of a few percent of nanoparticles to a Newtonian fluid does not change its apparent viscosity, the influence of the nanoparticles on the splashing transition is pronounced. We often view splashing in terms of fluid mechanics where a simple material is subjected to a complex flow and the fluid can be simply characterized by a Newtonian viscosity. For nanofluids, we have an apparently simple material in a complex flow, but the results show that the impact of the particles is nontrivial. This implies that we must now combine some of the insights we obtain from studying the rheological properties of nanosuspensions with this already complex problem.

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Section: Role Of Nanoparticlesmentioning

confidence: 99%

Section: ■ Role Of Nanoparticlesmentioning

confidence: 99%