Ferro-fluid droplet impact on hydrophobic surface under magnetic influence

Yilbaş, Bekir Sami; Abubakar, Abba Abdulhamid; Hassan, Ghassan; Al‐Qahtani, Hussain; Al‐Sharafi, Abdullah; AlZahrani, Abdullah A.; Mohammed, Anwaruddin Siddiqui

doi:10.1016/j.surfin.2022.101731

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…The fourth-grade model was found to be better at predicting the thin-film characteristics than the Newtonian model and it was found that the presence of slip conditions and the fluid's fourth-grade non-Newtonian behaviour were significant aspects of the flow (Sajid et al 2008). Yilbas et al (2022) looked into how the hydrophobicity of a rough surface, which is crucial in biomedical, sensing and separation applications, changes when a ferrofluid droplet is added to it. They discovered that the hydrophobicity of the rough surface was increased by the addition of a ferrofluid drop, making it simpler to control liquids deposited on the surface.…”

Section: Introductionmentioning

confidence: 99%

“…Yilbas et al. (2022) looked into how the hydrophobicity of a rough surface, which is crucial in biomedical, sensing and separation applications, changes when a ferrofluid droplet is added to it. They discovered that the hydrophobicity of the rough surface was increased by the addition of a ferrofluid drop, making it simpler to control liquids deposited on the surface.…”

Section: Introductionmentioning

confidence: 99%

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Exploring slip effects of ferrofluid film flow over a slanted rough surface

Bhandari,

Parmar

2024

J. Fluid Mech.

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We examined the influences of slip parameters on the velocity and thermal characteristics of a ferrofluid film of fixed thickness. The flow is generated on a rough and inclined whirling surface that is positioned in an external magnetic (dipole) field. The similarity transformation reduces the model equations (continuity, momentum, energy and concentration), and the solution of the normalized coupled ordinary differential equations is carried out through the finite element process. The influences of slip effects, Brownian motion, thermophoresis and a heat source on the velocity (radial, tangential and axial), gravity (drainage, induced), temperature profile and concentration profile are determined. The tangential flow and temperature are both decreased by an increase in the velocity slip parameter, whereas drainage, induced, radial and axial flows are increased. Enlarging the thermal slip parameter decreases the temperature. Improving slip parameters (velocity and thermal) also improves the concentration profile. Both Nusselt and Sherwood numbers are found to improve on improving the velocity slip parameter, while they decrease on decreasing the thermal slip parameter. The results and insights from this work could be applied to a wide range of medicinal fields, such as targeted medication therapy and delivery, tissue engineering, etc. as well as different industrial processes including coating, lubrication, heat transfer, etc.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring slip effects of ferrofluid film flow over a slanted rough surface

Bhandari,

Parmar

2024

J. Fluid Mech.

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“…Given that the magnetic forces exerted on a ferrofluid surpass gravitational forces by several orders of magnitude, the curvature induced by a magnetic field can be significantly more pronounced than that by gravity. Observing ferrofluid contact angles in magnetic fields might impose a finer magnification compared to gravity-based observations 22 . Furthermore, when subjected to a magnetic field, a sessile ferrofluid droplet undergoes elongation, leading to a reduction in its contact angle 23 .…”

Section: Introductionmentioning

confidence: 99%

A comparative study for ferro particles cloaking and wetting characteristics

Hassan,

Yilbas,

Abubakar

et al. 2024

Sci Rep

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Ferro hydrophobic particles possess essential properties for controlling the behavior of suspended substances in water. By adjusting the concentration of these particles, the magnetic force within the fluid carrier can be modified, leading to the emergence of distinct flow structures and patterns on the water's surface. This study examines the cloaking phenomenon exhibited by different ferroparticle conditions, employing both experimental and numerical approaches. Under the magnetic influence, hydrophilic particles can attain cloaking velocities of up to 35 mm/s, while hydrophobic particles remain unaffected by the magnetic force, remaining suspended on the water's surface. Hydrophobization of ferroparticles not only decreases their water-cloaking ability but also alters their magnetic properties. The inherent hydrophobic nature of these particles enhances water surface stability, rendering them valuable in various applications, including biomedical and self-cleaning technologies. This research holds particular significance for manipulating suspended particles in water, particularly in biomedical applications like drug delivery and tissue engineering, as well as for advancing self-cleaning technologies.

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