Construct · 3 fields · 3 citations
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In petrophysics porosity is the fraction of a rock's bulk volume that is pore space rather than solid grain, the room available to hold water, oil, or gas, so it sets how much fluid a reservoir can store. It is the same void-fraction construct that recurs in engineered and biological solids. Archie's 1942 The electrical resistivity log as an aid in determining some reservoir characteristics related porosity to electrical resistivity and made it measurable from well logs. The referent is the void volume fraction of a rock, measured as pore volume over bulk volume, the identical quantity that appears in ceramics and in bone.[1]
In materials science porosity is the volume fraction of voids left in a solid such as a sintered ceramic, and it is a decisive quantity because strength, stiffness, and thermal conductivity all fall as porosity rises. It is the same void-fraction measure used for rock, here governing how a fabricated material performs and fails. Rice's Porosity of Ceramics treats how pore fraction, size, and shape control properties. The referent is the void volume fraction of an engineered solid, measured as pore volume over bulk volume, the identical construct realised in a reservoir rock or in bone and tied to mechanical performance.[2]
In bone biomechanics porosity is the void fraction of bone tissue, from the large spaces of trabecular bone to the microscopic canals of cortical bone, and it strongly controls stiffness and strength because mechanical properties depend steeply on how much of the volume is mineralised solid. It is the same void-fraction construct as in rock and ceramics, here applied to living tissue and central to understanding fragility. Currey's Bones: Structure and Mechanics analyses how porosity and mineralisation set bone's mechanical behaviour. The referent is the void volume fraction of bone, measured as pore volume over bulk volume, the identical quantity that appears in reservoir rock and in engineered ceramics.[3]
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