Definition for "Porosity" in the Quantum Dictionary

- Natural & Formal Sciences -

Earth & Environmental Sciences Dictionary

An Earth and environmental sciences concept defining a process, measurement, or principle used to understand Earth and its systems. It applies within stated assumptions and depends on reliable observation and analysis. It does not ensure correct inference without attention to scale, uncertainty, and validation.

Natural & Formal Sciences Dictionary

The fraction of a porous material's total volume that is occupied by void (pore) space, typically expressed as a dimensionless ratio or percentage.

- Mathematics & Logic -

Pure Mathematics Dictionary

Porosity is a quantitative modulus for the relative size of holes in a set at small scales. Common formulations define the upper porosity of E at x as the limsup as r→0 of the supremum of α ∈ [0,1] such that there exists a ball of radius α r contained in B(x,r) \ E; global porosity may be the infimum of such local porosities or the existence of a uniform α>0 working for all x and small r.

Engineering & Applied Technologies Dictionary

The fraction of a material's bulk volume that is occupied by voids or pores, expressed as a dimensionless ratio (0–1) or percentage; includes both connected and isolated pore space and excludes surface roughness not forming internal voids.