Steady flow is maintained between two concentric cylinders, which are rotating at constant angular velocity of one (while the other is stationary) or both cylinders. let the inner cylinder have a radius of ro, angular velocity c and temperature to, while the outer cylinder has r? ojand t, respectively. the geometry is such that the only nonzero velocity component is ue and the variables us t and p must be functions only of radius by integrating the ordinary differential equations, and based on the boundary conditions, obtain the velocity and thermal profiles: uθ(r) and t(r).