Theory and Applications of Controlled Permeability
The problems associated with making precision permeability measurements are reviewed with specific reference to application of digital computing equipment to obtain the full significance of the test data. Experimental data are then presented to show the ability of the permeability test to characterize the physical properties of porous metal structures. Practical applications of permeability values are discussed, with particular reference to filters and porous aluminum bearings. The significance of the permeability measurements is further developed to include the calculation of specific surface.
The development of a more universal relation to characterize porous bodies is outlined and compared to Kozeny’s theory. The significance of the permeability and specific surface values of this relationship is compared to the results of a statistical analysis of the mercury intrusion pore spectra test. Finally, the role of statistics in obtaining a satisfactory relation between the physical properties of porous materials is discussed.
KeywordsPermeability Test Porous Metal Test Fluid Permeability Parameter Metal Powder Industry Federation
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