Unsteady flow of micropolar fluid through a circular pipe under a transverse magnetic field with suction/injection

In this paper, we consider the unsteady flow of an incompressible electrically conducting micropolar fluid through a circular porous pipe subjected to periodic suction/injection at the walls of the tube and in the presence of a transverse magnetic field. Under the Stokesian assumption and using the similarity transformations, the stream function and microrotation components are obtained in terms of Bessel's functions. The variation of skin friction with respect to micropolar parameters and Hartman's number, suction parameter are studied and depicted through graphs.