Hall and ion slip effects on MHD rotating boundary layer flow of nanofluid past an infinite vertical plate embedded in a porous medium

2020

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An attempt is made to investigate the steady magnetohydrodynamic convective flow of the viscous nanofluid due to a permeable exponentially stretching porous surface. Water is used as a traditional fluid while nanoparticles include copper and alumina. The fluid is electrically conducting, subject to an applied magnetic field with a constant strength. Convective type boundary conditions are employed in modeling the heat transfer process. The nonlinear partial differential equations governing the flow are reduced to an ordinary differential equation by similarity transformations and then solved using the Runge-Kutta fourth-order method. A parametric study of the physical parameters is made, and a representative set of numerical results for the velocity and temperature, as well as local shear stress and local Nusselt number, is presented graphically. Hartman number increase diminishes the velocity and has the contrary result in the subjective sense for the mass transfer parameter. An increase in the Prandtl number Pr lessens the temperature and thickness of the thermal boundary layer. The main conclusions have been indicated.

Section: Introductionmentioning

confidence: 99%

Heat transport on steady MHD flow of copper and alumina nanofluids past a stretching porous surface

2020

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“…Jitendra and Srinivasa 5 inquired about the Hall and ion slip effects on conductive flux to a gyratory liquid over a vertically exponential acceleration plate. Veera Krishna and Chamkha 6 discussed the radiation‐absorption, diffusion‐thermo, and Hall and ion slip effects on MHD convective rotation of nanofluids on a moving permeable plate with a constant temperature source. Sara and Bhatti 7 interrogated the MHD peristaltic flow of a non‐Newtonian nanofluid with chemical reaction, Hall and ion‐slip effects.…”

Section: Introductionmentioning

confidence: 99%

Hall and ion slip effects on MHD free convective rotating flow bounded by the semi‐infinite vertical porous surface

2020

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Thermodiffusion, thermal radiation, Hall and ion slip effects on heat and mass transport of free convective MHD micropolar fluid flow bounded by a semi-infinite absorbent plate with rotation and suction have been investigated. The plate is assumed to oscillate in time with constant frequency so that the solutions of the boundary layer are the same oscillatory type. The solutions are found analytically with the perturbation technique. With the help of graphic representations, the impacts of many critical parameters on velocity, temperature, and concentration within the boundary layer are discussed. In addition, local skin-friction, Nusselt number, and Sherwood numbers are determined and computationally analyzed. K E Y W O R D SDufour effect, mass transfer, micropolar fluid, rotating frame, suction

“…Jitendra and Srinivasa 43 examined Hall and ion‐slip effects on the convective flow of a gyratory fluid past a vertical exponential accelerated plate. Veera Krishna and Chamkha 44 discussed the radiation‐absorption, diffusion‐thermo, and Hall and ion‐slip effects on MHD free convective rotating flow of nanofluids over a moving permeable plate with a constant heat source. Jha and Oni 45 examined the role of a magnetic field on fully developed mixed convection flow of heat generating/absorbing fluid in a vertical micro‐concentric annulus with velocity slip and temperature jump at the surfaces of the cylinders.…”

Section: Introductionmentioning

confidence: 99%

Hall and ion slip effects on MHD laminar flow of an elastico‐viscous (Walter's‐B) fluid

2020

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We investigated the magnetohydrodynamic (MHD) laminar flow of an elastico-viscous electrically conducting (Walter's-B) fluid through a circular cylinder or pipe, loosely packed with a porous material subjected to Hall and ion-slip effects. The innovation of the study is to consider the entire flow domain without boundary layer approximation in the governing equations. Fully developed solutions of the velocity and pressure drop are obtained making use of perturbation approximation and computationally discussed with reference to flow governing parameters. It is quite exciting that the elastic parameter almost reduces the speed of the liquid in the center of the channel and then continuously expands into the cylinder. For engineering interest, we found the analytical solution and then computationally discussed for skin friction. The occurrence of a magnetic field and a porous matrix gives a fairly uneven flow between the pipes. Elasticity and suction are resistant to experience greater skin friction and are therefore useful for controlling flow separation. A porch has been made to include studies of non-Newtonian fluids with Hall and ion-slip effects due to the vast number of possible engineering applications, like power generators, MHD accelerators, refrigeration coils, electric transformers, and heating elements. K E Y W O R D S circular cylinder, elastico-viscous fluids, Hall and ion-slip effects, laminar flow, MHD, porous medium ORCID M. Veera Krishna