Abstract
An improved pressure loss model for viscous compressible flow through a long, permeable, polymeric capillary, a relevant problem in capillary gas permeator design, has been developed and confirmed experimentally. Experimental verification was obtained by measuring pressure losses over a silicone rubber capillary at various flow rates and applied inlet pressures using carbon dioxide, helium, oxygen and nitrogen. In particular, a first-order approximation to the axial pressure gradient for compressible flow in a permeable capillary has been formulated. Radial and axial displacement of the capillary have also been incorporated into the model for small deformations.
Published Version
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