Effects of variable viscosity and inclined magnetic field on peristaltic motion of fourth-grade fluid with heat transfer

The effect of variable viscosity on the peristaltic flow of fourth-grade fluid is investigated. The concept of inclined magnetic field is employed in mathematical simulation. Heat transfer analysis is carried out in the presence of viscous dissipation. The peristaltic waves propagating along the channel walls with different amplitudes and phase induce asymmetry in the flow. Numerical solutions are obtained for the stream function, longitudinal velocity, temperature and pressure gradients. Numerical integration is performed for the pressure rise per wavelength. Pumping and trapping phenomena are analyzed.