The prime motive of this pagination is to adumbrate attributes of water-based hybrid nanoliquid flow with dispersion of single wall carbon nanotubes. An innovative thermal conductance model containing the aspects of nanolayer formation along with shape and size of inserted particles is obliged. Flow transport mechanism is addressed mathematically in the form Navier Stokes equations with magnetization. In addition, heat and mass transport mechanism is manipulated by considering the impression of viscous dissipation and chemical reactions. Walls of channels are assumed to be porous in order to examine the phenomenon of suction and injection. Mathematical formulation of problem is represented in view of ODE’s and simulated computationally by Keller Box scheme. Subsequently, Newton method is utilized to solve system of nonlinear equations. Results are revealed through graphs and tables showing behavior of associated momentum, temperature and concentration profile against involved parameters. Quantities of engineering interest like wall drag coefficient, heat and mass fluxes are computed. Credibility of work is shown by creating match with existing study and an excellent agreement is found. After thorough analysis it is determined that heat flux increases with induction of single wall carbon nanotubes in base liquid. It is also manifested that thermal conductance of base fluid enriches with increase in thickness of nanolayer and radius of particles. In addition, positive trend in skin friction and heat flux coefficients is measured against elevation in nanoparticle volume fraction. Opposite behavior in velocity and temperature distributions against all flow variables near upper and lower walls of channel is depicted due to provision suction and injection wall velocities. Due to consideration of viscous dissipation heat transfer rate with in the flow domain reduces. By increasing Reynold number concentration distribution diminishes due to dominant effect of inertial forces. Decline in momentum distribution against Hall current parameter is adhered. Uplift and decrement in temperature distribution is manifested against heat source and sink parameters respectively. 

On analysis of magnetized viscous fluid flow in permeable channel with single wall carbon nano tubes dispersion by executing nano-layer approach

Present numerical study examines the heat and mass transfer characteristics of magneto-hydrodynamic Casson fluid flow between two parallel plates under the influence of thermal radiation, internal heat generation or absorption and Joule dissipation effects with homogeneous first order chemical reaction. The non-Newtonian behaviour of Casson fluid is distinguished from those of Newtonian fluids by considering the well-established rheological Casson fluid flow model. The governing partial differential equations for the unsteady two-dimensional squeezing flow with heat and mass transfer of a Casson fluid are highly nonlinear and coupled in nature. The nonlinear ordinary differential equations governing the squeezing flow are obtained by imposing the similarity transformations on the conservation laws. The resulting equations have been solved by using two numerical techniques, namely Runge-Kutta fourth order integration scheme with shooting technique and bvp4c Matlab solver. The comparison between both the techniques is provided. Further, for the different set physical parameters, the numerical results are obtained and presented in the form of graphs and tables. However, in view of industrial use, the power required to generate the movement of the parallel plates is considerably reduced for the negative values of squeezing number. From the present investigation it is noticed that, due to the presence of stronger Lorentz forces, the temperature and velocity fields eventually suppressed for the enhancing values of Hartmann number. Also, higher values of squeezing number diminish the squeezing force on the fluid flow which in turn reduces the thermal field. Further, the destructive nature of the chemical reaction magnifies the concentration field; whereas constructive chemical reaction decreases the concentration field. The present numerical solutions are compared with previously published results and show the good agreement.

https://link.springer.com/content/pdf/10.1007/s11771-019-4080-0.pdf

Radiative squeezing flow of unsteady magneto-hydrodynamic Casson fluid between two parallel plates

In the presence of a uniform magnetic field, the heat and mass transmission mechanisms of steady magnetohydrodynamic nanofluid flows between two parallel plates are presented in this paper. Ethylene glycol and water are mixed in equal proportions in the fluid. The hybrid nanoparticle is analyzed in this work, utilizing MWCNT and Ag as the particles. As a novelty, the nonlinear equations were solved using the Radial Basis Function methodology for the first time, and the numerical fourth-order Runge–Kutta method was used to compare the results, which were then illustrated in figures. The end result demonstrates that the numerical method and the Radial Basis Function approach are in excellent accord. Furthermore, the impact of various shape factors was investigated. The impact of a variety of active parameters, such as the magnetic parameter, viscosity coefficient, thermophoretic parameter, Brownian parameter, and nanofluid shape factor, on non-dimensional velocity, temperature, and concentration profiles has been shown. The Nusselt number drops as the thermophoretic and Brownian parameters are increased, but the viscosity coefficient has the reverse tendency. 

A novel approach for assessment of MHD mixed fluid around two parallel plates by consideration hybrid nanoparticles and shape factor

The growth of civilization over the world is the history of the growth of energy. An energy-deficient society is weak and cannot make economic advancement and it is primarily the electrical energy that keeps the wheels of progress moving at a very acceleratating pace. The main source of electrical energy has been fossil fuels, hydel and nuclear, even though solar energy geothermal energy,wind power,tidal power and fusion power offer hopeful and technological alternatives.However,for most of the nations,the main burden of rapid growth rate of electrical power production for the next few decades is to be borne by power stations using fossil fuel-fired steam turbine-units.In this next context the advent of direct conversion of thermal energy to electrical energy by means of a Magnetohydrodynamic converter has gained considerable attention.MHD has many applications in science and industry.To name a few,Astrophysical Geophysical and Cosmic physics.It is still very important,in the problem of fusion power.It has applications in the creation and containment of hot plasmas by electromagnetic forces,since material walls would be destroyed.

Radiation and Chemical Reaction Effects on Mhd

The objective of the current problem is to explore the impact of wall motion on flow, heat and species concentration of a UCM fluid in a magnetohydrodynamic Darcian channel. The flow is confined between two moving walls. The effects of the wall motion on the physical quantities for expanding and contracting cases are studied through non-dimensional numbers and variables. Numerical solutions for the highly nonlinear differential equations are obtained by reducing the governing PDE to ODE using well-established similarity variables. The variation of skin friction, Nusselt and Sherwood numbers has been investigated with the help of surface plots so that the influence of the squeezing number on the other non-dimensional parameters can be deeply understood. The results suggest that the squeezing channel intensifies the mass transfer and skin friction at the walls and it also increases the velocity, temperature and concentration of the fluid across the channel.

Double Dispersion Effects on MHD Squeezing Flow of UCM Fluid through a Porous Medium

Effect of nonlinear thermal radiation on the unsteady magnetohydrodynamic slip flow of Casson fluid between parallel disks in the presence of thermophoresis and Brownian motion effects are investigated numerically. A similarity transformation is employed to reduce the governing partial differential equations into ordinary differential equations. Further, Runge-Kutta and Newton’s methods are adopted to solve the reduced ordinary differential equations. The effect of non-dimensional governing parameters, namely magnetic field parameter, Casson parameter, thermophoresis parameter, Brownian motion parameter, thermal radiation parameter, unsteadiness parameter, velocity slip parameter and temperature slip parameter on velocity, temperature and concentration fields are discussed and presented through graphs. Reduced Nusselt and Sherwood numbers are computed and presented through a table. It is found that rising values of nonlinear thermal radiation parameter depreciate the reduced Nusselt and Sherwood numbers. Thermophoresis and Brownian motion parameters have tendency to regulate the thermal and concentration boundary layers. Rising values of Casson parameter enhances the heat and mass transfer rate.

http://jcarme.sru.ac.ir/article_644_76cd77161c529071eb063293148c37d7.pdf

Rushi Kumar B

Papers

Unsteady MHD nonlinear radiative squeezing slip-flow of Casson fluid between parallel disks