Exercise 3
Consider again the diffusion of argon and helium as described in Exercise 1. All conditions are the same in the present problem except that the pressure in the left-hand header is elevated just enough to cause the steady-state mole fluxes of argon and helium to be equal in magnitude and opposite in direction. Assume that diffusion due to the pressure gradient is negligible. If the intrinsic permeability of the dry sand is 1 × 10−12 m2 and the viscosity of the gas is 2.3 × 10−5 Pa-s, calculate the pressure difference between the headers.
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