Spectral simulation to investigate the effects of nanoparticle diameter and nanolayer on the ferrofluid flow over a slippery rotating disk in the presence of low oscillating magnetic field

Abstract

This article explores the impacts of the solid–liquid interfacial layer and nanoparticle diameter on the unsteady ferrous‐water nanoliquid flow over a spinning disk. The existence of velocity slip is presumed on the disk. Additionally, the low oscillating magnetic field effect is included to extract the hydrothermal consequences of the problem. Shliomis theory has been presented to verbalize the foremost equations of the mentioned flow problem. The similarity transformation renders the dimensionless equations. Spectral quasilinearization technique along with the residual error profile is presented to resolve the converted equations. An adequate number of pictures and tables are portrayed to improve the parametric study of the problem. Several streamlines, isotherms, contour plots, and three‐dimensional figures are presented to disclose the hydrothermal integrity of the nanofluidic transport. Effective magnetization parameter produces 4.67% skin frictional increment. Heat transport declines for nanoparticle diameter but is enhanced for nanolayer conductivity ratio. The presence of an oscillating magnetic field always promotes heat transference as compared with the absence of the oscillating field. The nanolayer conductivity ratio conveys the highest 8.69% heat transport rate, whereas the magnetization factor provides the lowest, 1.79%. It has novel applications in magnetic drug targeting, hard disk scaling, magnetic resonance imaging, spin coating, lubrication, and so forth.

Outlining the features of nanoparticle diameter and solid–liquid interfacial layer and Hall current effect on a nanofluid flow configured by a slippery bent surface

“…Temperature outlines of nanofluid are reduced when diameter of nano‐sized particles $${d}_{p}$$ enhances. The previous studies 9 got an identical effect. Imprints are well distinctive inside boundary layer.…”

“…The radiative heat flux is given by $${q}_{r}=-\frac{4{\sigma }^{* }}{3{k}^{* }}\frac{\partial {T}^{4}}{\partial r}\left(=\frac{16{\sigma }^{* }}{3{k}^{* }}{T}^{3}\frac{\partial T}{\partial r}\right)$$. And for nanofluid $${\mu }_{nf},{\rho }_{nf},{(\rho {c}_{p})}_{nf}$$ are respectively defined by 9 $$$\left.\begin{array}{c}{\mu }_{nf}={\mu }_{f}{(1-\phi )}^{-2.5},{\rho }_{nf}=(1-\phi ){\rho }_{f}+\phi {\rho }_{s},\\ {(\rho {c}_{p})}_{nf}=(1-\phi ){(\rho {c}_{p})}_{f}+\phi {(\rho {c}_{p})}_{s}\end{array}\right\}.$$$…”

“…Acharya et al 6 deliberate hydrothermal distinctions of an unsteady flow of nanofluids due to the inspiration of nanolayers and diameter of nanoparticles. Related studies of nanofluid flow accompanied by the effect of nanolayers and the diameter of nanoparticles revealed by Rana and Beg, 7 Rana et al, 8 and Acharya 9 …”

Entropy generation optimization of unsteady radiative hybrid nanofluid flow over a slippery spinning disk

“…Related articles are in. [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] Coming to the laws of thermodynamics it is seen that the second law of thermodynamics is much more reliable than the first law of thermodynamics owing to its limitation of efficiency in heat transfer in engineering systems. 58 This second law is used for minimizing the irreversibility of thermal structures.…”

Thermal enhancement in Falkner–Skan flow of the nanofluid by considering molecular diameter and freezing temperature

“…Therefore, Acharya et al 28 reported the temperature behaviour under in radiated nanofluid by using thermal conductance model comprising the influences of nanolayer and diameter. Other recent studies for heat transfer under solid–liquid interfacial layer, solar energy and ferro fluid flow slippery geometry were described in 29 – 31 .…”