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

Heat Transfer ◽  
2021 ◽  
Author(s):  
Nilankush Acharya
Keyword(s):  
Magnetic Field ◽  
Rotating Disk ◽  
Spectral Simulation ◽  
Nanoparticle Diameter ◽  
Oscillating Magnetic Field

scholarly journals Significance low oscillating magnetic field and Hall current in the nano-ferrofluid flow past a rotating stretchable disk

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Muhammad Ramzan ◽  
Saima Riasat ◽  
Yan Zhang ◽  
Kottakkaran Sooppy Nisar ◽  
Irfan Anjum Badruddin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Graphical Representation ◽  
Volume Fraction ◽  
Hall Current ◽  
Tangential Velocity ◽  
Rotating Disk ◽  
Bejan Number ◽  
Thermal Profile ◽  
Oscillating Magnetic Field ◽  
The Impact

AbstractThe present investigation involves the Hall current effects past a low oscillating stretchable rotating disk with Joule heating and the viscous dissipation impacts on a Ferro-nanofluid flow. The entropy generation analysis is carried out to study the impact of rotational viscosity by applying a low oscillating magnetic field. The model gives the continuity, momentum, temperature, magnetization, and rotational partial differential equations. These equations are transformed into the ODEs and solved by using bvp4c MATLAB. The graphical representation of arising parameters such as effective magnetization and nanoparticle concentration on thermal profile, velocity profile, and rate of disorder along with Bejan number is presented. Drag force and the heat transfer rate are given in the tabular form. It is comprehended that for increasing nanoparticle volume fraction and magnetization parameter, the radial, and tangential velocity reduce while thermal profile surges. The comparison of present results for radial and axial velocity profiles with the existing literature shows approximately the same results.

Framing the Impacts of Highly Oscillating Magnetic Field on the Ferrofluid Flow Over a Spinning Disk Considering Nanoparticle Diameter and Solid–Liquid Interfacial Layer

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Nilankush Acharya
Keyword(s):  
Magnetic Field ◽  
Interfacial Layer ◽  
Angular Displacement ◽  
Linearization Method ◽  
Computational Scheme ◽  
Field Frequency ◽  
Nanoparticle Diameter ◽  
Spinning Disk ◽  
Oscillating Magnetic Field ◽  
Solid Liquid

Abstract This article communicates on the ferrofluid flow over a spinning disk in the presence of highly oscillating magnetic field. The flow is presumed to be unsteady. Ferrous nanoparticles are suspended within base medium water. This investigation reveals how presence and absence of oscillating magnetic field influence the hydrothermal basis of the flow. Also, the effects of particles diameter and solid–liquid interfacial layer have been precisely incorporated to reveal the thermal integrity of the system. Shliomis theory is introduced to frame the leading equations of the system. Resulting equations have been solved using innovative spectral quasi-linearization method (SQLM). Residual error analysis is included to explore the advantage of such computational scheme. The influence of dynamic parameters on the velocities and temperature is deliberated through graphs and tables. Several 3D pictures and contour plots are depicted to extract the key points of the flow. The results exhibit that heat transfer is reduced for nanoparticle diameter but amplifies for base liquid nanolayer conductivity ratio and elevated field frequency enhances the temperature. Relative magnetization reduces for high field frequency, but increases for angular displacement. SQLM exhibits an accurate computational scheme with fast convergence.

Theoretical analysis of entropy generation in second grade nanofluid considering heat source/sink over a rotating disk

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Muhammad Faisal Javed ◽  
Mohammed Jameel ◽  
Muhammad Ijaz Khan ◽  
Sumaira Qayyum ◽  
Niaz B. Khan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Source ◽  
Chemical Reaction ◽  
Nonlinear Partial Differential Equations ◽  
Rotating Disk ◽  
Second Grade ◽  
Surface Drag ◽  
Viscoelastic Parameter ◽  
Content Type ◽  
Source Sink

Purpose This study aims to focus on second grade fluid flow over a rotating disk in the presence of chemical reaction. Uniform magnetic field is also taken into account. Because of the smaller magnetic Reynolds number, induced magnetic field is negligible. Heat equation is constructed by considering heat source/sink. Design/methodology/approach Suitable variables are used to transform nonlinear partial differential equations to ordinary ones. Convergent series solutions are attained by applying homotopy analysis method. Findings Trends of different parameters on concentration, velocity and temperature are shown graphically. Skin friction coefficient and local Nusselt number are calculated and investigated under the effect of elaborated parameters. An elevation in the value of magnetic field parameter causes collapse in the velocity distributions. Velocity distribution in increasing function of viscoelastic parameter. Temperature and concentration profiles are decreasing functions of viscoelastic parameter. Concentration distribution reduces by increasing the chemical reaction parameter. There is more surface drag force for larger M, while opposite behavior is noted for β. Originality/value To the best of the authors’ knowledge, such consideration is yet to be published in the literature.

Oscillating magnetic field current drive in a spherical plasma device

2000 ◽  
Vol 42 (7) ◽  
pp. 807-821 ◽  
Author(s):  
S Xu ◽  
W Luo ◽  
K N Ostrikov ◽  
J Ahn ◽  
S Lee
Keyword(s):  
Magnetic Field ◽  
Current Drive ◽  
Plasma Device ◽  
Oscillating Magnetic Field ◽  
Spherical Plasma
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