A Treatise On Electricity And Magnetism

Heat transport of magnetized Newtonian nanoliquids in an annular space between porous vertical cylinders with discrete heat source

Present communication aims to determine the impact of Cattaneo–Christov model and convective boundary on second-grade nanofluid flow alongside a Riga pattern. Zero mass flux is accounted at the solid surface of Riga pattern such that the fraction of nanoparticles maintains itself on strong retardation. The impact of Lorentz forces generated by Riga pate is also an important aspect of the study. The governing nonlinear problem is converted into ordinary problems via suitably adjusted transformations. Spectral local linearization method has been incorporated to find the solutions of the nonlinear problems. Variation in horizontal movement of the nanofluid, thermal distribution and concentration distribution of the nanoparticles has been noted for various fluid parameters. The results are plotted graphically. Outcomes indicate that the horizontal movement gains enhancement for elevated values of modified Hartman factor. Thermal state of the nanofluid and concentration of nanoparticles receive reduction for incremental values of relaxation time parameters. Numerical results for skin friction and heat flux have been reported in tabular form. The CPU run time and residual error are obtained to check the efficiency of the method used for finding the solution.

Numerical spectral examination of EMHD mixed convective flow of second-grade nanofluid towards a vertical Riga plate using an advanced version of the revised Buongiorno’s nanofluid model

Hybrid nanoliquid as an expansion of nanoliquid is acquired by scattering combination of nano-powder or numerous distinct nanomaterials in the regular liquid. Hybrid nanofluids are impeding fluids which furnish better performance of heat transport and thermo-physical properties than convectional heat transport fluids (ethylene glycol, water and oil) and nanofluids with single material. At this juncture, a sort of hybrid nanofluid comprising nano-size materials through an ethylene glycol as a regular liquid is modeled to expand the magnetic impact on the mixed convection flow through a shrinking/stretched wedge. The impacts of Joule heating and viscous dissipation are also revealed. The PDEs which governed the flow problem with heat transport are changed into a dimensionless ODEs system through a similarity technique. Then these equations are numerically exercised by utilizing bvp4c solver. The impact of emerging constraints on the flow field with heat transport is discussed with the aid of plots. Also, the stability analysis is implemented to classify which result is physically reliable and stable.

https://link.springer.com/content/pdf/10.1007/s13369-020-04680-7.pdf

Mixed Convective Magneto Flow of SiO2–MoS2/C2H6O2 Hybrid Nanoliquids Through a Vertical Stretching/Shrinking Wedge: Stability Analysis

Hybrid nanofluids are of great importance in the field of industry due to high effective thermal conductivity which causes high rates of heat transfer. The current article investigates the impact of variable magnetic field and chemical reaction of MWCNT/Fe3O4–water hybrid nanofluid over an exponentially shrinking porous sheet with slip boundary conditions. Suitable transformations convert the governing equations into coupled nonlinear ordinary differential equations. Further, these equations are solved by the help of shooting technique. The influences of operating parameters on the flow domain as well as force coefficients and rates of heat and mass transfers are computed and shown through graphs and tables. It is found that hybridity augments the temperature and concentration profiles. Further, suction/injection parameter enriches the skin friction coefficient, but reverse trend is observed for velocity slip parameter.

Influence of MWCNT/Fe3O4 hybrid nanoparticles on an exponentially porous shrinking sheet with chemical reaction and slip boundary conditions

The irreversibility in convective nanofluid flow in the occurrence of a magnetic field (MHD) in a cavity with chamfers is calculated by numerical approach. The nanofluid flow is considered under the impacts of magnetic field and thermal gradient. The continuity, motion and energy equations are solved by applying COMSOL Multiphysics computer package. The impacts of $$({\text{Ha}})$$
 Hartmann number, $$(\gamma )$$
 elevation of magnetic field, nanoparticle volume fraction, heat transmission and entropy analysis on the flow of nanofluid are discussed. Results reveal that, the impacts of volume fraction and the magnetic force on different irreversibility are significant. Moreover, results indicate the existence of a critical $$({\text{Ha}}_{{\text{c}}} )$$
 Hartmann number this represents the frontier between the domains where the magnetic field dominates via its intrinsic effect and its extrinsic effect.

A. Assia

Papers

Entropy generation on magneto-convective flow of copper–water nanofluid in a cavity with chamfers