Dust removal from a hydrophobic surface by rolling fizzy water droplets

Yilbaş, Bekir Sami; Hassan, Ghassan; Al‐Qahtani, Hussain; Bahatab, Saeed; Sahin, Ahmet Z.; Al‐Sharafi, Abdullah; Abubakar, Abba Abdulhamid

doi:10.1039/d0ra03215h

Cited by 14 publications

(13 citation statements)

References 44 publications

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“…This increases the frequency of cleaning process and brings the extra cost operating the energy harnessing devices. On the other hand, droplet rolling and the mechanism of the dust picking from hydrophobic surfaces was studied earlier, 8,9 however, cloaking of droplet uid over thick dust layer is le for future study. In the current study, water cloaking of dust at various thicknesses is considered in relation to water droplet cleaning of hydrophobic surfaces.…”

Section: Introductionmentioning

confidence: 94%

“…In most of the self-cleaning applications, a water droplet rolls/slides on the surface and dust on the path of the droplet are picked up by the droplet uid. 8 However, large size droplets are used to secure large droplet path on the soiled surface because of achieving large area of cleaning on the surface per rolling of the droplet. In general, the large droplets on the hydrophobic surfaces suffer from bulging and increased droplet puddling becomes unavoidable on the surface.…”

Section: Introductionmentioning

confidence: 99%

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Droplet fluid infusion into a dust layer in relation to self-cleaning

2020

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Droplet fluid infusion into a dust layer in relation to self-cleaning

2020

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“…Strong adhesion of dust on surfaces prevents the simple techniques to be adopted for dust mitigation from surfaces largely in space explorations 12 . Individual dust particle has high surface roughness parameter (1.5–1.7) 13 , which reduces contact area between the substrate surface settled and dust; yet, because of high surface free energy of dust (~ 120 mN/m 2 13 ) causes strong adhesion of the dust particles on substrate surfaces. This becomes critically important for small size particles because of reduced roughness parameter (smoother surfaces), which increases interfacial (contact area) and enhances particle adhesion on the contacted surfaces 14 .…”

Section: Introductionmentioning

confidence: 99%

Avalanche effect for chemically modified dust mitigation from surfaces

Adukwu

Yilbaş

Jalilov

et al. 2021

Sci Rep

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Cost effective dust mitigation from surfaces is one of the challenges in various sectors. The reduction of dust adhesion on surfaces plays a vital role for dust mitigation from surfaces under the gravitational influence. Creating an avalanche effect on dusty surfaces improves the dust mitigation rate and provides an effective cleaning process. Hence, solution treatment of dust by low concentration hydrofluoric acid is considered towards reducing dust adhesion on glass surfaces. To increase the rate of dust mitigation, the avalanche influence is created by the higher density and larger size particles (5300 kg/m3 and ~ 50 µm) than the average size dust particles (2800 kg/m3 and 1.2 µm) via locating them in the top region of the dusty glass surfaces. Mitigation velocity of the dust particles is evaluated using a high-speed recording system and the tracker program. Findings revealed that solution treatment (curing) of the dust particles results in the formation of fluorine compounds, such as CaF2 and MgF2, on dust surfaces, which suppress dust adhesion on surfaces. OSHA Globally Harmonized System lists the fluorine compounds formed as environmentally non-harmful. Avalanche's influence results in dust mitigation at a smaller tilt angle of the glass surface (~ 52°) than that of the case with none-avalanche influence (63°). Area cleaned on the glass surface, via dust mitigation, is larger as the avalanche is introduced, which becomes more apparent for the solution treated dust particles. Dust mitigation under avalanche influence improves optical transmittance of the dusty glass samples by a factor of 98%.

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“…A large size droplet path width can be achieved by rolling large size droplets on dusty hydrophobic surfaces. However, increasing droplet size enhances droplet wobbling over the surface because of the gravitational effect 18 . Wobbling of large size droplets can create striations-like edges along the droplet path.…”

Section: Introductionmentioning

confidence: 99%

On the mechanism of droplet rolling and spinning in inclined hydrophobic plates in wedge with different wetting states

Yilbaş

Yakubu

Abubakar

et al. 2021

Sci Rep

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A water droplet rolling and spinning in an inclined hydrophobic wedge with different wetting states of wedge plates is examined pertinent to self-cleaning applications. The droplet motion in the hydrophobic wedge is simulated in 3D space incorporating the experimental data. A high-speed recording system is used to store the motion of droplets in 3D space and a tracker program is utilized to quantify the recorded data in terms of droplet translational, rotational, spinning, and slipping velocities. The predictions of flow velocity in the droplet fluid are compared with those of experimental results. The findings revealed that velocity predictions agree with those of the experimental results. Tangential momentum generated, via droplet adhesion along the three-phase contact line on the hydrophobic plate surfaces, creates the spinning motion on the rolling droplet in the wedge. The flow field generated in the droplet fluid is considerably influenced by the shear rate created at the interface between the droplet fluid and hydrophobic plate surfaces. Besides, droplet wobbling under the influence of gravity contributes to the flow inside the rolling and spinning droplet. The parallel-sided droplet path is resulted for droplet emerging from the wedge over the dusty surface.

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Dust removal from a hydrophobic surface by rolling fizzy water droplets

Abstract: Here, environmental dust cleaning from an inclined hydrophobic surface by rolling liquid droplets has been studied and the influence of fluid droplets on the dust removal rate has been examined.

Cited by 14 publications

References 44 publications

Droplet fluid infusion into a dust layer in relation to self-cleaning

Droplet fluid infusion into a dust layer in relation to self-cleaning

Avalanche effect for chemically modified dust mitigation from surfaces

On the mechanism of droplet rolling and spinning in inclined hydrophobic plates in wedge with different wetting states

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