Permeance

Permeance is a measure of the ability of a material to allow the passage of a fluid (usually a gas or liquid) through it. In the context of physics and engineering, particularly in fields like fluid mechanics and material science, permeance quantifies how easily a fluid can move through a porous medium or a barrier. Permeance is often related to permeability, which is a similar concept but differs in how it is measured and used.