Dimensional inspection of the analytical expressions for the flow velocity profile (i.e. Eqs. 17 and 18) reveals that they have the physical dimension of length over time which is the physical dimension of velocity as it should be. Similarly, dimensional inspection of the analytical expression for the volumetric flow rate (i.e. Eq. 19) reveals that it has the physical dimension of volume over time which is the physical dimension of volumetric flow rate as it should be.