Nanofluid Past Research Articles

Nonlinear Radiative Heat Transfer and Boundary Layer Flow of Maxwell Nanofluid Past Stretching Sheet

Nonlinear Radiative Heat Transfer and Boundary Layer Flow of Maxwell Nanofluid Past Stretching Sheet

MHD Stagnation Point Flow of Viscoelastic Nanofluid Past a Convectively Heated Stretching Surface

A mathematical model is established to examine the influence of viscous dissipation and joule heating on magnetohydrodynamic (MHD) flow of an incompressible viscoelastic nanofluid over a convectively heated stretching sheet. Brownian motion and thermophoresis effects have been introduced in this nanofluid model. The governing equations are transformed into ODE’s by using suitable similarity conversions and are then solved numerically by the most robust shooting technique. The significance of numerous physical flow constraints is performed for, and distributions through graphs. It is noticed that, the increases for higher values of and reduces for rising values of heat source and Biot numbers. An outstanding contract was found between our numerical results and previously publicised results.

Slip Flow of an Unsteady Nanofluid Past a Stretching Surface in a Transverse Magnetic Field Using SRM

A theoretical and numerical examination has been completed to talk about the unsteady, two dimensional slip flow of a nanofluid of heat and mass transfer with transverse magnetic field was investigated in this paper. A stretching surface is used to investigate the flow. Obtained nonlinear equations are solved by Spectral Relaxation Method (SRM) technique and the results are verified by comparing the results obtained by using the Matlab in-built boundary value problem solver bvp4c, and the outcomes which are published in previous papers. The outcomes are exhibited pictorially and talked about difference coming about parameters. Expanding heat transfer rate, mass transfer rate and velocity slip raises velocity yet to be diminishes temperature and skin friction (surface shear stress).

Thermodynamic Analysis of MHD Heat and Mass Transfer of Nanofluids Past a Static Wedge with Navier Slip and Convective Boundary Conditions

Due to its industrial applications in last 2 decades, in this study, the second law of thermodynamics is applied to MHD flow of water-based nanofluids past a static wedge. The Buongiorno model with Navier slip and convective boundary conditions is employed; in addition, the effects of Brownian motion and thermophoresis have been included. An attempt has been made to focus on the effects of magnetic field, Navier slip and convective heat of nanofluid flow over a wedge. Using similarity transformations, the governing partial differential equations are reduced to ordinary differential equations which are solved by using the spectral quasi-linearization method. The numerical solution for the dimensionless temperature, velocity and concentration gradients is performed to investigate the variation of dimensionless entropy generation due to fluid flow, thermal gradient, mass and combined impact of heat and mass transfer past a static wedge. The effects of magnetic field, Navier slip, convective heat and mass boundary conditions on the forced convection of nanofluid over a wedge are investigated. Original results observed show that the total dimensionless entropy generation rate increases significantly with local Reynolds number, Prandtl number and thermophoresis parameters.

Mixed Convection Flow of Viscoelastic Nanofluid Past a Horizontal Circular Cylinder with Viscous Dissipation

The purpose of this study was to examine the effect of viscous dissipation on mixed convection flow of viscoelastic nanofluid past a horizontal circular cylinder. Carboxymethyl cellulose solution (CMC) is chosen as the base fluid and copper as a nanoparticle with the Prandtl number Pr = 6.2. The transformed boundary layer equations for momentum and temperature subject to the appropriate boundary conditions are solved numerically by using Keller-box method. The influenced of the dimensionless parameters such as Eckert number, mixed convection parameter, nanoparticles volume fraction and viscoelastic parameter on the flow and heat transfer characteristics is analyzed in detail and presented graphically. The results come out with the velocity profiles are increased while the temperature profiles are decreased by increasing the values of nanoparticles volume fraction and viscoelastic parameter, respectively. The graph shows that, increasing Eckert number the skin friction is also increases. The values of skin friction are increased by increasing mixed convection parameter, but the values of Nusselt number produce an opposite behavior. The present study has many applications especially in heat exchangers technology and oceanography. Therefore, in future, it is hoping to study the viscoelastic nanofluid flow past a different geometric such as sphere and cylindrical cone.

Double-Diffusive Free Convective Flow of Maxwell Nanofluid Past a Stretching Sheet with Nonlinear Thermal Radiation

Double-Diffusive Free Convective Flow of Maxwell Nanofluid Past a Stretching Sheet with Nonlinear Thermal Radiation

Magnetohydrodynamic Bio-Convection Flow of Oldroyd-B Nanofluid Past a Melting Sheet with Cross Diffusion

Magnetohydrodynamic Bio-Convection Flow of Oldroyd-B Nanofluid Past a Melting Sheet with Cross Diffusion

Simulation of Natural Convective Boundary Layer Flow of a Nanofluid Past a Convectively Heated Inclined Plate in the Presence of Magnetic Field

This paper deals with the numerical simulation of transient magnetohydrodynamics natural convective boundary layer flow of a nanofluid over an inclined plate. In the modeling of nanofluids, dynamic effects including the Brownian motion and thermophoresis are taken into account. Numerical solutions have been computed via the Galerkin-finite element method. The effects of angle of inclination, buoyancy-ratio parameter, Brownian motion, thermophoresis and magnetic field are taken into account and controlled by non-dimensional parameters. To compute the rate of convergence and error of the computed numerical solution, the double mesh principle is used. Similarity solutions are calculated and presented graphically for non-dimensional velocity, temperature, local rate of heat and mass transfer with pertinent parameters. The modified Nusselt number decreases with increasing inclination angle, buoyancy-ratio parameter, Brownian motion and thermophoresis parameter, whereas it increases with increasing Prandtl number. Validation of the results is achieved with earlier results for forced convective flow and non-magnetic studies. Such problems have several applications in engineering and petroleum industries such as electroplating, chemical processing of heavy metals and solar water heaters. External magnetic fields play an important role in electrical power generation, inclination/acceleration sensors, fine-tuning of the final materials to industrial specification because of their controlling behaviour on the flow characteristics of nanofluids.

Effect of thermal diffusion and heat-generation on MHD nanofluid flow past an oscillating vertical plate through porous medium

Present investigation involves study of thermal diffusion and heat generation effects on the unsteady magnetohydrodynamic flow of radiating and electrically conducting nanofluid past over an oscillating vertical plate through porous medium. Mathematical modeling of the problem gives rise to system of partial differential equations, and is solved analytically using Laplace transform. Effects of pertinent parameters on the fluid flow, heat and mass transfer characteristics have been studied graphically and the physical aspects are discussed in detail. With the help of velocity, temperature and concentration; Skin friction, Nusselt number and Sherwood number are derived and represented through tabular form.

Effect of MHD on Nanofluid flow, Heat and Mass Transfer over a Stretching Surface Embedded in a Porous Medium

The steady, laminar, mixed convection, boundary layer flow of an incompressible nanofluid past over a semi-infinite stretching surface in a nanofluid –saturated porous medium with the effects of magnetic field and chemical reaction is studied. The governing boundary layer equations (obtained with the Boussinesq approximation) are transformed into a system of nonlinear ordinary differential equations by using similarity transformation. The effects of various physical parameters are analyzed and discussed in graphical and tabular form. Comparison with published results is presented and we found an excellent agreement with it. Mainly, it found firstly, that an increase in magnetic parameter M decreases both the local Nusselt number and local Sherwood number. Secondly, a great order of the chemical reaction increases the Nusselt and Sherwood numbers.

Bioconvection of Nanofluid Past Stretching Sheet in a Porous Medium in Presence of Gyrotactic Microorganisms with Newtonian Heating

In this study, the effect of Newtonian heating on the boundary layer flow and heat transfer over a stretching surface in a porous medium in the presence of gyrotactic microorganisms and nanoparticle fractions are analysed. The governing equations are reduced to a system of couple non-linear ordinary differential equations, subjected to the Boussinesq approximation and asymmetric heat conditions. The reduced governing ordinary differential equations are then solved numerically. The solutions obtained are graphically represented. The effects of the controlling parameters on the flow, heat, nanoparticle concentration and the density of motile microorganisms have been examined. The results of the present study show the flow velocity, heat and mass transfer and motile microorganism characteristics on the stretching sheet are strongly influenced by the bioconvection parameters and Newtonian.

Mixed Convection Boundary Layer Flow of Viscoelastic Nanofluid Past a Horizontal Circular Cylinder with Convective Boundary Condition

The steady mixed convection boundary layer flow of viscoelastic nanofluid past a horizontal circular cylinder taking into account the thermal convective boundary condition is investigated numerically. The nanofluid model use involves the Tiwari and Das model. The resulting system of nonlinear partial differential equations is solved numerically using an efficient implicit finite-difference scheme known as the Keller-box method. Effect of the various parameters, namely, the mixed convection parameter, the nanoparticles volume fraction, viscoelastic parameter and the conjugate parameter on the dimensionless velocity, temperature, skin friction, as well as wall temperature have been presented graphically and discussed. It is found that both skin friction and wall temperature decreases for the increase in the viscoelastic parameter. On the other hand, increasing conjugate parameter leads to the increase of the temperature and velocity profiles. For fixed nanoparticles volume fraction, as the value of the mixed convection parameter increases, the magnitude of both the skin friction coefficient and wall temperature also increases.

Mixed Convective MHD Flow and Heat Transfer of Uniformly Conducting Nanofluid Past an Inclined Cylinder in Presence of Thermal Radiation

Mixed Convective MHD Flow and Heat Transfer of Uniformly Conducting Nanofluid Past an Inclined Cylinder in Presence of Thermal Radiation

Slip Flow of Nanofluid Past a Vertical Plate with Ramped Wall Temperature Considering Thermal Radiation

Slip Flow of Nanofluid Past a Vertical Plate with Ramped Wall Temperature Considering Thermal Radiation

Numerical exploration of the combined effects of non-linear thermal radiation and variable thermo-physical properties on the flow of Casson nanofluid over a wedge

PurposeThe effect of non-linear thermal radiation and variable thermo-physical properties are investigated in the Falkner-Skan flow of a Casson nanofluid in the presence of magnetic field. The paper aims to discuss this issue.Design/methodology/approachSelected bunch of similarity transformations are used to reduce the governing partial differential equations into a set of non-linear ordinary differential equations. The resultant equations are numerically solved using Runge-Kutta-Fehlberg fourth-fifth-order method along with shooting technique.FindingsThe velocity, temperature and concentration profiles are evaluated for several emerging physical parameters and are analyzed through graphs and tables in detail.Research limitations/implicationsThis study only begins to reveal the research potential and pitfalls of research and publishing on boundary-layer flow, heat and mass transfer of Casson nanofluid past and the moving and static wedge-shaped bodies.Originality/valueIt is found that the presence of non-linear thermal radiation and variable properties has more influence in heat transfer. Furthermore, temperature profile increases as the radiation parameter increases.

Unsteady Flow of a Nanofluid Past a Permeable Shrinking Cylinder using Buongiorno's Model

The unsteady laminar boundary layer flow of a nanofluid and heat transfer over a permeable shrinking cylinder using the Buongiorno’s nanofluid model is investigated. Using a similarity transformation, the governing partial differential equations are transformed into a system of ordinary differential equations and then solved numerically using a shooting method. The numerical results are obtained for velocity, temperature and concentration profiles as well as the skin friction coefficient, the local Nusselt number and the local Sherwood number. Dual solutions are found to exist in a certain range of the suction and unsteadiness parameters. It is observed that suction parameter increase both the skin friction coefficient and the heat transfer rate at the surface, whereas the opposite trend is obtained for the Sherwood number. It is also observed that suction widens the range of the unsteadiness parameter for which the solution exists.

Transient Free Convection MHD Flow of a Nanofluid Past a Vertical Plate with Radiation in the Presence of Heat Generation

Transient Free Convection MHD Flow of a Nanofluid Past a Vertical Plate with Radiation in the Presence of Heat Generation

Magnetohydrodynamic and Heat Transfer Effects on the Stagnation-Point Flow of an Electrically Conducting Nanofluid Past a Porous Vertical Shrinking/Stretching Sheet in the Presence of Variable Stream Conditions

Magnetohydrodynamic and Heat Transfer Effects on the Stagnation-Point Flow of an Electrically Conducting Nanofluid Past a Porous Vertical Shrinking/Stretching Sheet in the Presence of Variable Stream Conditions

Double Diffusive Magnetohydrodynamic Free Convective Flow of Nanofluids Past an Inclined Porous Plate Employing Tiwari and Das Model: FEM

Double Diffusive Magnetohydrodynamic Free Convective Flow of Nanofluids Past an Inclined Porous Plate Employing Tiwari and Das Model: FEM

Magnetohydrodynamic Heat Transfer of Nanofluids Past a Stretching Cylinder with Non-Uniform Heat Source/Sink and Chemical Reaction

In this investigation, we intend to present the magnetohydrodynamic (MHD) heat and mass transfer of nanofluids along a stretching cylinder in the presence of non-uniform heat source/sink and chemical reaction under the prescribed surface heat flux boundary conditions on the cylinder surface. The governing partial differential equations are approximated by a system of non-linear locally similarity ordinary differential equations which are solved numerically using fifth-order Runge–Kutta–Fehlberg (RKF45) integration scheme shooting method. Present results are compared with the previously published results in some limiting cases and the results are found to be in an excellent agreement. Three different kinds of nanoparticles, namely copper (Cu), alumina (\({\hbox {Al}}_2{\hbox {O}}_3\)) and titanium dioxide (\({\hbox {TiO}}_2\)) with water as base fluid are considered here. The numerical results for the dimensionless velocity, temperature and nanoparticle volume fraction as well as on local skin-friction coefficient, local Nusselt number and Sherwood number have been constructed and illustrated graphically to reveal some interesting physical phenomena. The results of the present paper show that the flow velocity and temperature on the stretching cylinder and also skin-friction coefficient are strongly influenced by the curvature parameter.