11.1 Drag Flow Slit Formula Use the shell balance technique to find the formula for the velocity profile through parallel plates with a width, W, that is much greater than their separation, H. The lower plate moves with a linear velocity of VW. There is a pressure difference across the length of the flow region (L) of P. Use the velocity profile to find the expression for the total flow rate. Compare your result to the wire and cable result derived in class. Determine the ratio of inner to outer radius of the annular flow model at which the results converge with your solution for slit flow