MHD Peristaltic Flow of a Couple Stress Fluids with Heat and Mass Transfer through a Porous Medium

In the present article, we have studied the effects of heat and mass transfer on the MHD flow of an incompressible, electrically conducting couple stress fluid through a porous medium in an asymmetric flexible channel over which a traveling wave of contraction and expansion is produced, resulting in a peristaltic motion. The flow is examined in a wave frame of reference moving with the velocity of the wave. Formulas of dimensionless velocity, temperature and concentration are obtained analytically under assumptions of long wavelength and low Reynolds number. The effects of various parameters of interest such as the couple stress fluid parameter, Darcy number, Hartmann number and Schmidt number on these formulas were discussed and illustrated graphically through a set of figures. Key words: peristalsis,  Couple stress fluid,  Porous medium,  MHD flow, Heat transfer,  Mass transfer

Homotopy perturbation method for MHD pulsatile non-Newtonian nanofluid flow with heat transfer through a non-Darcy porous medium

In this contribution, the MHD pulsatile mechanism with heat transfer of an incompressible non-Newtonian nanofluid between two permeable parallel vertical plates is investigated. The effects of non-Darcy porous medium, radiation, Ohmic and viscous dissipation are included. By using the homotopy perturbation method, a solution is obtained, which is in a good agreement with the momentum, energy and nanoparticles equations. Numerical results for the velocity, temperature and nanoparticles distributions are obtained. Keywords: Pulsatile flow, Non-Newtonian nanofluid, Non-Darcy porous medium, Heat transfer, 76: Fluid mechanics, 34: Ordinary differential equations, 80: Classical thermodynamics, Heat transfe