Theoretical investigation of micropolar fluid flow between two porous disks

P. Valipour¹, S. E. Ghasemi², M. Vatani³

(1. Department of Textile and Apparel, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran;
2. Young Researchers and Elite Club, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran;
3. Department of Mechanical Engineering, Babol University of Technology, Babol, Iran)

Abstract:The steady, laminar, incompressible and two dimensional micropolar flow between two porous disks was investigated using optimal homotopy asymptotic method (OHAM) and fourth order Runge–Kutta numerical method. Comparison between OHAM and numerical method shows that OHAM is an exact and high efficient method for solving these kinds of problems. The results are presented to study the velocity and rotation profiles for different physical parameters such as Reynolds number, vortex viscosity parameter, spin gradient viscosity and microinertia density parameter. As an important outcome, the magnitude of the microrotation increases with an increase in the values of injection velocity while it decreases by increasing the values of suction velocity.

Key words:theoretical investigation; porous disks; micropolar fluid flow; optimal homotopy asymptotic method (OHAM); microrotation