Flow rate and velocity of ideal gas in a capillary column with uniform permeability

When the column pressure drop is high, the average velocity of a carrier ga s is proportional to the square root of the outlet velocity and the flow ra te. Characteristic velocity, flow rate and pressure - the boundary conditio ns between low and high pressure drop regions are introduced. previously de rived equations for average velocity vs. outlet velocity were modified to i nclude the flow rate and to become more suitable for the separate studies o f the low and high pressure drop regions.