Krogh length

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The Krogh Length, , is the distance between capillaries at which nutrients diffuse to based on cellular consumption of the nutrients.[1][2]

It can be described as:

where is the diffusion constant of the solute in the substrate, is the concentration in the channel, and is the consumption by the cells. Units are in terms of length.


  1. Fournier, R. L. Basic Transport Phenomena in Biomedical Engineering 1st edn (Taylor & Francis, London, 1999).
  2. Choi et al. Microfluidic scaffolds for tissue engineering. Nature Materials (2007) vol. 6 pp. 908-915

See also