Diffusion theory: transient and stationary states
Permeability measurements to control the preservation of packaged foods
Article REF: AG6531 V1
Diffusion theory: transient and stationary states
Permeability measurements to control the preservation of packaged foods

Author : Catherine Joly

Publication date: June 10, 2025 | Lire en français

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2. Diffusion theory: transient and stationary states

Gas transfer through the thickness e of a packaging film (or membrane with two parallel faces) separating two media, or compartments, called upstream and downstream, takes place in the direction of transport (figure 3 ). Transfers are considered here to be unidirectional and perpendicular to the membrane walls.

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