Analytic Approximate Solutions for Unsteady Two‐Dimensional and Axisymmetric Squeezing Flows between Parallel Plates

Abstract

The flow of a viscous incompressible fluid between two parallel plates due to the normal motion of the plates is investigated. The unsteady Navier‐Stokes equations are reduced to a nonlinear fourth‐order differential equation by using similarity solutions. Homotopy analysis method (HAM) is used to solve this nonlinear equation analytically. The convergence of the obtained series solution is carefully analyzed. The validity of our solutions is verified by the numerical results obtained by fourth‐order Runge‐Kutta.