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# Nernst-Planck equation

The Nernst-Planck equation describes the flux of ions through a diffusive membrane under the influence of both an ionic concentration gradient (X) and electric potential (V).

### Additional recommended knowledge

It is defined :

$\Phi = -D \nabla X - P X \nabla V$

Where D is a set of constants related to scaling the concentration gradient (X) and P is a set of constants related to scaling the potential (V) across the diffusive membrane.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Nernst-Planck_equation". A list of authors is available in Wikipedia.
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