steady mhd flow of micropolar fluid between two rotating cylinders ...

number graphically. Kamel [19] has studied thecreeping motion of a polar fluid in the annular regionbetween the two eccentric rotating cylinders. Hedepicted the dependence of the velocity componentsand the spin on the coupling number and the lengthratio graphically. Meena et al [20] have studied theflow of a viscous incompressible fluid between twoeccentric rotating porous cylinders with smallsuction/injection at both the cylinders and they havepresented stream lines and pressure plotsgraphically. Borkakati et al [21] have examined thesteady flow of an incompressible electricallyconducting fluid between two coaxial cylinders inpresence of radial magnetic field and they plottedgraphically the heat transfer rate from the cylindersagainst the Hartmann number.Srinivasacharya et al [22] have studied the steadyflow of incompressible and electrically conductingmicropolar fluid flow between two concentric porouscylinders and they have presented the profiles ofvelocity and micro-rotation components for differentmicropolar fluid parameters and magneticparameter. Pontrelli et al [23] studied the steadyflow of an Oldroyd-B fluid between two porousconcentric circular cylinders. They found velocity bynumerically solving a system of nonlinear ODEsobtained from the equation of motion andconstitutive equations and the effects of non-Newtonian parameters on velocity and on shear stressare shown through graphs.Fetecau et al [24] studied the velocity fieldscorresponding to the motion of an incompressiblesecond grade fluid due to longitudinal and torsionaloscillations of an infinite circular cylinder.In this paper, we study the steady incompressibleelectrically conducting micropolar fluid flow betweentwo concentric rotating cylinders with porous liningin the presence of an axial magnetic field.FORMULATION AND SOLUTION OF THE PROBLEMConsider an incompressible micropolar fluid betweentwo concentric circular cylinders of radii a and b(a