The role of porosity in filtration: VI. New definition of filtration resistance

Abstract The definition of filtration resistance is re‐examined in view of the new theory ( 12 ) of the variation of flow rate with respect to distance through a filter cake. In the new definition it is shown that the filtration resistance depends upon slurry concentration as well as applied pressure. A correction factor modifying the specific filtration resistance previously defined by Ruth ( 5 , 6 ) is developed. Where the hydraulic pressure variation within a cake is known, methods are presented for calculating the variation of flow rate with respect to distance and the change of filtration resistance in relation to slurry concentration.