A theory proposed by S. I. Pai in 1953 gives the following velocity values u(r) for turbulent (high-Reynolds number) airflow in a 4-cm-diameter tube:
r, cm 0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0
u, m/s 6.00 5.97 5.88 5.72 5.51 5.23 4.89 4.43 0.00
Comment on these data vis-à-vis laminar flow, Prof. 3.3. Estimate, as best you can, the total volume flow Q through the tube, in m3/s.