Consider again the radial flow between two parallel disks examined. The case of low Reynolds number was examined there, and a solution in which the non-linear terms were ignored was obtained. Here we wish to examine the role of inertia by performing a regular perturbation analysis. Expand \(v_{r}\) and \(v_{z}\) as perturbation expansions of \(R e\), and show that the base solution. Derive the next approximation which includes the inertia term, which was neglected.