Magnetohydrodynamic peristaltic transport of couple stress fluid through porous medium in an inclined asymmetric channel with heat transfer

The present study is about the pressure-driven heated bi-phase flow in two slippery walls. The non-Newtonian couple stress fluid is suspended with spherically homogenous metallic particles. The magnetic susceptibility of Hafnium allures is taken into account. The rough surface of the wall is tackled by lubrication effects. The nonlinear coupled partial differential equations along with the associated boundary conditions are first reduced into a set of ordinary differential equations by using appropriate transformations and then numerical results were obtained by engaging the blend of Runge–Kutta and shooting techniques. The sway of physical quantities are examined graphically. An excellent agreement within graphical illustration and numerical results is achieved.

Thermally Charged MHD Bi-Phase Flow Coatings with Non-Newtonian Nanofluid and Hafnium Particles along Slippery Walls

Some analytical solutions for flows of Casson fluid with slip boundary conditions

The aim of the present attempt was to investigate the hydromagnetic peristaltic motion of a reacting and radiating couple stress fluid in an inclined asymmetric channel filled with a porous medium. The governing equations for the flow with heat and mass transfer are presented. The Mathematical modeling is investigated by utilizing long wavelength and low Reynolds number assumptions. The exact solution has been evaluated for the stream function, velocity, temperature, concentration and pressure gradient. The pressure rise solution has been simplified using numerical integration. The effects of Hartmann number, Darcy number, thermal Grashof number, couple stress parameter, thermal radiation parameter, species Grashof number, heat generation parameter, inclination angle and chemical reaction parameter on the velocity characteristics, heat and mass transfer characteristics and pumping characteristics are presented through graphically and discussed in detail.

Hydromagnetic peristaltic motion of a reacting and radiating couple stress fluid in an inclined asymmetric channel filled with a porous medium

In this paper, two-dimensional non-Newtonian couple stress fluid flow over the upper horizontal surface of a paraboloid (uhsp) (shaped like a submarine or any aerodynamical automobile) is investiga...

Flow analysis of biconvective heat and mass transfer of two-dimensional couple stress fluid over a paraboloid of revolution

In the present article, the exact solutions for fundamental flows namely Couette, Poiseuille and generalized Couette flows of an incompressible couple stress fluid between parallel plates are obtained using slip boundary conditions. The effect of various parameters on velocity for each problem is discussed. It is found that, for each of the problems, the solution in the limiting case as couple stresses approaches to zero is similar to that of classical viscous Newtonian fluid. The results indicate that, the presence of couple stresses decreases the velocity of the fluid.

Analytical solutions of couple stress fluid flows with slip boundary conditions

We establish, in this paper, the closed form analytical solutions of steady fully developed flows of couple stress fluid between two concentric cylinders, generated due to the constant pressure gradient or the translatory motion of the outer cylinder or both, using the slip boundary conditions. The classical solutions for Newtonian fluid in the hydrodynamic case appear as a limiting case of our solutions. The velocity profiles of the flows are presented and the effect of various parameters on velocity is discussed. The results indicate that the presence of couple stresses decreases the velocity of the fluid.

/pdf/analytical-solutions-of-some-fully-developed-flows-of-couple-46wwmq47ay.pdf

Analytical Solutions of Some Fully Developed Flows of Couple Stress Fluid between Concentric Cylinders with Slip Boundary Conditions

The effect of zinc oxide on the physical and optical characteristics of calcium oxide containing boro-tellurite glasses

Low concentration doping effects of holmium on structural and spectroscopic properties of cobalt ferrite

Rare Earth modification effects the crystal structure and magnetic behavior in ferrites because of the role of unpaired valence electrons of f-orbital. In this work, the Co-ferrite was modified by substituting Yb3+ at Fe3+ ions to report the structural and magnetic correlations. The rare earth-doped cobalt ferrites of the compositions CoFe2-xYbxO4 (x = 0 to 0.02) were synthesized by the solid-state reaction method. The structural studies were carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM) also by Raman, and Fourier transforms infrared (FTIR) spectroscopic techniques. The optical and magnetic properties are studied by UV-visible spectroscopy and magnetic isotherm loops at 300 K respectively. The x = 0.005 substitution is observed to have distinct properties compared to other compositions. There is a vast change in band gap as well as magnetization for x = 0.005. Further, the x = 0.01, 0.015, and 0.02 samples seem to have similar behavior but there is considerable variation compared to pure Co-ferrite. The small additions of rare-earth elements may create high anisotropy to appear the large change in the structural and magnetic properties.

D. Sreenivasu

Papers

Analytical solutions of couple stress fluid flows with slip boundary conditions

Analytical Solutions of Some Fully Developed Flows of Couple Stress Fluid between Concentric Cylinders with Slip Boundary Conditions

The effect of zinc oxide on the physical and optical characteristics of calcium oxide containing boro-tellurite glasses

Low concentration doping effects of holmium on structural and spectroscopic properties of cobalt ferrite

Synthesis, Spectral, and Magnetic Studies of Yb-Doped CoFe2O4