A tubular aeration system is used to oxygenate a stream of water. This pipeline has an internal chamber with a permeable wall that only allows the diffusion of oxygen. Pure oxygen is injected at a pressure of 1atm and the oxygen concentration between the inner surface of the permeable wall and the water is 1.2mol/m3. The system is fed with water without dissolved oxygen and supplies water with a concentration of 0.2mol/m3 of dissolved oxygen at the outlet. 1 - Determine the required flow velocity, V, of the water to maintain this concentration of dissolved oxygen at the outlet. 2 - Calculate the Reynolds number to validate the equation 2