<unk>  is a scientific model in the area mass transfer explaining concentration of molecular oxygen through a cylindrical capillary tube as a function of a changing position over the capillary tube's length. It was first conceptualized by August<unk>  in 1919 to describe oxygen supply in living tissues, particularly the one occurring in human blood vessels. Its applicability has been extended to various academic fields, and has been successful explaining drug diffusion, water transport, and ice formation in tissues.
Krogh model
Kindling model
Donabedian model
Wilson–Cowan model
Wells-Riley model
Reed–Frost model
Bidomain model
Kokko and Rector Model