Example 1.24 Hydrodynamic Flow in a Porous Diaphragm A porous carbon diaphragm 25.4mm thick of average pore diameter 0.01cm allowed the flow of nitrogen at the rate of 0.05m3 (measured at 300K and 1atm)/m2s with a pressure difference across the diaphragm of 500Pa. The temperature was 300K and the downstream pressure 0.1atm. The viscosity of nitrogen at 300K is 180P. (a) Estimate the value of the viscous flow parameter, B0, for this solid. (b) Calculate the nitrogen flow to be expected at 400K with the same pressure difference. At 400K, the viscosity of nitrogen is 220P. Example 1.24 Hydrodynamic Flow in a Porous Diaphragm A porous carbon diaphragm 25.4mm thick of average pore diameter 0.01cm allowed the flow of nitrogen at the rate of 0.05m3 (measured at 300K and 1atm)/m2s with a pressure difference across the diaphragm of 500Pa. The temperature was 300K and the downstream pressure 0.1atm. The viscosity of nitrogen at 300K is 180P. (a) Estimate the value of the viscous flow parameter, B0, for this solid. (b) Calculate the nitrogen flow to be expected at 400K with the same pressure difference. At 400K, the viscosity of nitrogen is 220P