Porosity is purely a static measure of the amount of empty space present within a material, quantifying the existence of the voids. Permeability, however, is a dynamic measure that describes the material’s ability to allow fluids to flow through those internal spaces.
Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Strictly speaking, some tests measure the "accessible void", the total amount of void space accessible from the surface (cf. closed-cell foam). There are many ways to test porosity in a ...
Porosity Porosity is an intrinsic property of every material. It refers to the amount of empty space within a given material. In a soil or rock the porosity (empty space) exists between the grains of minerals. In a material like gravel the grains are large and there is lots of empty space between them since they don’t fit together very well.
Learn about porosity, its types, measurement methods, and its importance in geology, engineering, and environmental science.
Porosity is a volumetric property of porous media, which indicates the volumetric ratio of the void space (pores, fractures, cracks) occupied in the unit volume of the porous medium. Therefore, the porosity of a reservoir is a measure of the ability of a reservoir to store fluid (oil, gas, and water). Porosity φ is determined, as follows:
Porosity is a fundamental property of materials describing the amount of void space, or empty volume, contained within a solid structure. It is a universal characteristic found in everything from subterranean rock layers to human bone tissue and engineered filtration devices. Understanding this measure of internal hollowness directly influences a material’s ability to store, transport, or ...