A Numerical Analysis of the Hybrid Nanofluid (AgTiO2Water) Flow in the Presence of Heat and Radiation Fluxes++ (original) (raw)

Spherical shaped Ag-Fe3O4H2O Hybrid Nanofluid Flow Squeezed between Two Riga Plates with Nonlinear Thermal Radiation and Chemical Reaction Effects

Energies

The main concern is to explore an electro-magneto hydrodynamic (EMHD) squeezing flow of Ag-Fe3O4H2O hybrid nanofluid between stretchable parallel Riga plates. The benefits of the use of hybrid nanofluids, and the parameters associated to it, have been analyzed mathematically. This particular problem has a lot of importance in several branches of engineering and industry. Heat and mass transfer along with nonlinear thermal radiation and chemical reaction effects have also been incorporated while carrying out the study. An appropriate selection of dimensionless variables have enabled us to develop a mathematical model for the present flow situation. The resulting mathematical method have been solved by a numerical scheme named as the method of moment. The accuracy of the scheme has been ensured by comparing the present result to some already existing results of the same problem, but for a limited case. To back our results further we have also obtained the solution by anther recipe kno...

Inclined magnetic field and nonlinear thermal radiation effects on nanofluids flow with homogeneous-heterogeneous reactions

AIP Conference Proceedings, 2022

The present article analyzes the stagnation point boundary layer flow of nanofluids towards a stretching sheet in a porous media using similarity transformations. We study the impacts of nonlinear thermal radiation, inclined magnetic field, homogeneous and heterogeneous reactions, viscous dissipation and heat generation in Ag-water and Cu-water nanofluids. The numerical solutions with the corresponding boundary conditions are obtained by adopting bvp4c program in Matlab. Influence of physical parameters on fluid flow behavior are exhibited via graphs. Nusselt number and skin friction coefficient data are exhibited through table. Nanofluid velocity reduces with increasing magnetic parameter and inclination angle. Increment values of Eckert number intensifies velocity and temperature distributions of the nanofluids. This flow model has applications in engineering and industrial devices, such as heat exchangers, lubricants, coolants, chemical catalyst reactors, and food processing.

Numerical simulation of energy transfer in radiative hybrid nanofluids flow influenced by second-order chemical reaction and magnetic field

AIP Advances

In this mathematical model, the consequences of Soret and Dufour’s effects on energy and mass transport have been reported. The hybrid nanofluid (hnf) comprised of silver (Ag) and magnesium oxide (MgO) nps is studied over a stretching rotating sheet. The influence of thermal radiation, second-order chemical reaction, activation energy, and the magnetic field is also applied to the fluid flow. The phenomena are designed in form of nonlinear Partial differential equations (PDEs), which are reduced to dimensionless ordinary differential equations through similarity replacement. Furthermore, the parametric continuation method (PCM) has been employed to estimate the reduced form of differential equations. The graphical results are obtained for velocity, mass, and energy profiles vs different physical interest entities. It has been noted that the velocity curve drops vs the variation of stretching sheet rotation factor, Hartmann number, and the mounting number of MgO and Ag nano particula...

Magnetohydrodynamic nonlinear thermal radiative heat transfer of nanofluids over a flat plate in a porous medium in existence of variable thermal conductivity and chemical reaction

International Journal of Ambient Energy, 2019

The effects of variable thermal conductivity and first-order chemical reaction on magnetohydrodynamic (MHD) flow with non-linear thermal radiation of nanofluid over a flat plate in a porous medium have been studied in this paper. The governing system of ordinary differential equations has been solved numerically. Numerical results are presented both in tabular and graphical forms for solid volume fraction φ (0.01 ≤ φ ≤ 0.2), magnetic field parameter M (1 ≤ M ≤ 20), permeability parameter P (1 ≤ P ≤ 20), variable thermal conductivity parameter (0.1 ≤ ≤ 5), thermal radiation parameter Nr (0.1 ≤ Nr ≤ 5), wall temperature excess ratio parameter θ w (0.5 ≤ θ w ≤ 3), Schmidt number Sc (0.1 ≤ Sc ≤ 2) and chemical reaction parameter λ (0.1 ≤ λ ≤ 5) illustrating the effects on the velocity, temperature and concentration as well as on the skin-friction coefficient, local Nusselt number and local Sherwood number for four types of metallic or non-metallic nanoparticles, namely copper (Cu), alumina (Al 2 O 3), titanium dioxide (T iO 2) and silver (Ag) in the base-fluid water (P r = 6.8). The obtained results show that the effects of increasing the values of the variable thermal conductivity and wall temperature excess ratio parameters there is decrease in the local Nusselt number value.

MHD flow and radiation heat transfer of nanofluids in porous media with variable surface heat flux and chemical reaction

Applied Mathematical Modelling, 2015

This paper studies MHD flow and radiation heat transfer of nanofluids against a flat plate in porous medium with the effects of variable surface heat flux and first-order chemical reaction. Three types of nanoparticles 2 3 , Cu Al O and Ag are investigated. Similarity transformations are applied to reduce the governing partial differential equations with boundary conditions into a system of ordinary differential equations over a semi-infinite interval. An efficient analytical approach based on differential transformation base functions method (DTM-BF) for unbounded domains is performed to give approximate solutions which are verified by numerical ones, showing close agreement. The effects of the solid volume fraction, types of nanoparticles, permeability, magnetic field, chemical reaction, Schmidt number, radiation and suction/blowing on velocity, temperature and concentration fields are graphically illustrated and analyzed in detail.

Magnetohydrodynamics Ag-Fe3O4-Ethylene Glycol Hybrid Nanofluid Flow and Heat Transfer with Thermal Radiation

CFD Letters

The potential of hybrid nanofluid as an alternative heat transfer fluid is undoubted and the insightful research on enhancing its thermal conductivity is crucial. This study accentuates the influence of magnetic field and thermal radiation on the ethylene glycol base hybrid nanofluid with a combination of argentum and magnetite nanoparticles. The mathematical equations of the hybrid nanofluid model are derived with the suitable similarity transformations and then solved numerically with the execution of bvp4c codes in Matlab software. Graphical results show that an upsurge in magnetic parameter reduces the momentum boundary layer thickness while the higher thermal radiation enlarges the thermal boundary layer thickness. The effects of suction and nanoparticles concentration are also presented graphically. Stability analysis reveals that the first solution obtained in this study is stable, and conversely, the second solution is not.

Nonlinear studies on the effect of non-uniform heat generation/absorption on hydromagnetic flow of nanofluid over a vertical plate

Nonlinear Analysis: Modelling and Control, 2016

The analytical and numerical studies are performed to investigate the non-uniform heat generation/absorption effect on the boundary layer flow of an incompressible, electrically conducting nanofluid over a vertical plate in the presence of thermal radiation. The highly nonlinear governing equations along with the boundary conditions are converted into ordinary differential equations by appropriate similarity transformations. The transformed highly nonlinear ordinary differential equations are solved both analytically and numerically using homotopy analysis method and fourth-order Runge-Kutta method with shooting technique, respectively, for the various values of physical parameters. The results show that the presence of both space and temperature dependent heat generation enhances the velocity and temperature profiles and reduces the solid volume fraction of nanofluid profile. Comparison between present analytical and numerical results is found to be good.

Flow and Heat Transfer of a Nanofluid by Mixed Convection with Nonuniform Heat Source/Sink and Magnetic Field Effect: A Numerical Approach

Computational Thermal Sciences, 2019

Heat transfer characteristics of a two-dimensional steady hydromagnetic mixed-convection flow of a nanofluid over a nonlinear stretching sheet taking into account the effects of internal heat generation/absorption have been investigated numerically. The governing partial differential equations are nondimensionalized and transformed into similar forms by using appropriate similarity transformations. The transformed set of coupled nonlinear partial differential equations is solved using spectral local linearization method. The effects of different flow controlling parameters, namely, space-and temperature-dependent heat source/sink, buoyancy force, magnetic force, stretching index, Brownian motion, thermophoresis and Lewis number parameter on the flow field, heat transfer characteristics, and nanoparticles concentration, are examined.

Nanofluids flow over a permeable unsteady stretching surface with non-uniform heat source/sink in the presence of inclined magnetic field

Journal of the Egyptian Mathematical Society, 2019

This work analyzes the unsteady two-dimensional nanofluid flow over a vertical stretching permeable surface in the presence of an inclined magnetic field and nonuniform heat source/sink. Four different types of nanoparticles, namely silver Ag, copper Cu, alumina Al 2 O 3 , and titania TiO 2 , are considered by using water as a base fluid with the Prandtl number Pr = 6.785. The governing partial differential equations are transformed to coupled non-linear ordinary differential equations by appropriate similarity transformation. Furthermore, the similarity equations are solved numerically by using the fourth-order Runge-Kutta integration scheme with Newton Raphson shooting method. A comparison of obtained numerical results is made with previously published results in some special cases, and excellent agreement is noted. Numerical results for velocity and temperature profiles as well as skin friction coefficient and local Nusselt number are discussed for various values of physical parameters. It tends to be discovered that, the magnetic field inclination angle γ has the capability to strengthens the magnetic field and reduce the velocity profile of the flow. Also, it can be found that, by using various types of nanofluids, velocity and temperature distributions change, which means that the nanofluids are important in the cooling and heating processes. The thermal boundary layer thickness is related to the increased thermal conductivity of different types of nanofluids, i.e., the minimum (maximum) value of the temperature is obtained by adding titanium oxide (silver) to the fluid as the nanoparticles.

MHD Mixed Convection Hybrid Nanofluids Flow over a Permeable Moving Inclined Flat Plate in the Presence of Thermophoretic and Radiative Heat Flux Effects

Mathematics

Recent nanotech advancements have created a tremendous platform for the development of a superior ultrahigh performance coolant referred to as nanofluid for several industrial and engineering technologies. In this research, the impact of thermophoretic and viscous dissipation on the radiative mixed convective flow comprising hybrid nanofluid through an inclined permeable moving flat plate with a magnetic field is examined numerically. A model of non-linear differential equations is derived based on some realistic assumptions and tackled numerically using the bvp4c technique. The impact of the specific set of distinguished parameters on the velocity profiles, shear stress, temperature distribution profiles, heat transfer, concentration distribution profile, and mass transfer for the two dissimilar branch solutions are discussed in detail. In addition, it has been discovered that double solutions exist in the case of an opposing flow, while a single solution is observed in the case of...