MEASUREMENT OF HYDRAULIC RADIUS OF POROUS POLYMER MEMBRANE USING SPECIFIC PERMEABILITY AND POROSITY VALUES

Abstract

The study concern with the measurement of hydraulic radius of imported porous polymer disc of known values (0.8, 1)μm, using specific permeability and porosity data.The study started with the design and built up a permeability unit, with a sample cell specified for this purpose. The followed by leak test and calibration.Volumetric flow rate as a function of pressure difference, across the sample under test, were measured. The slope of the measured values (Q, Δp) at the linear limit, was applied to calculate the mean hydraulic radius; with respect to the air viscosity value, width and Area of the sample. The compared data gives a limit of accuracy in the range of (12 – 16)%.