We investigate the evolution of hydromagnetic perturbations in a small section of accretion disks. It is known that molecular viscosity is negligible in accretion disks. Hence, it has been argued that a mechanism, known as magnetorotational instability (MRI), is responsible for transporting matter in the presence of a weak magnetic field. However, there are some shortcomings, which question the...

The study of hydromagnetic unsteady MHD flow of an incompressible, electrically conducting, viscous fluid past an infinite vertical porous plate along with porous medium of time dependent permeability under oscillatory suction velocity normal to the plate has been made. It is considered that the influence of the uniform magnetic field acts normal to the flow and the permeability of the porous m...

Hall effects on the unsteady hydromagnetic flow of a viscous incompressible electrically conducting fluid bounded by an infinite flat porous plate in the presence of a uniform transverse magnetic field has been analyzed. Initially ( ) the fluid at infinity moves with uniform velocity . At time , the plate suddenly moves with uniform velocity in the direction of the flow. The velocity field and ...

An unsteady, two-dimensional, hydromagnetic, laminar mixed convective boundary-layer flow of an incompressible, Newtonian, electrically-conducting and radiating fluid along a semi-infinite vertical permeable moving plate with heat and mass transfer is analyzed, by taking into account the effect of viscous dissipation. The plate moves with a constant velocity in the direction of fluid flow while...

This paper reports the numerical study of magnetohydrodynamic radiative-convective flow in a square cavity containing porous medium with Hall currents. is relent to hydromagnetic fuel cell design and thermofluidic dynamics complex magnetic liquid fabrication enclosures. The governing equations this fluid system are solved by finite-difference vorticity stream function approach executed MATLAB s...

Two-dimensional hydromagnetic flow of an incompressible Jeffrey nanofluid over an exponentially stretching surface is examined in the present article. Heat and mass transfer analysis is performed in the presence of thermal radiation, viscous dissipation, and Brownian motion and thermophoresis effects. Mathematical modelling of considered flow problem is developed under boundary layer and Rossel...

In this work, the Micropolar fluid flow and heat transfer past a horizontal stretching sheet through porous medium is studied including the effect of radiation. A uniform magnetic field is applied transversely to the direction of the flow. Viscous dissipation effects are included in the energy equation. The governing differential equations of the problem have been transformed into a system of n...