Numerical investigationofthe flow of amicropolar fluid through a porous channel with expanding or contracting walls

In this paper, we study the flow of a micropolar fluid in a porous channel with expanding or contracting walls. First, we use spectral collocation method on the governing equations to obtain an initial approximation for the solution of equations. Then using the obtained initial approximation, we apply the homotopy analysis method to obtain a recursive formula for the solution.

Homotopy analysis method; Spectral collocation method; Series solution; Micropolar fluid