diffusion coefficient, \(D\)

https://doi.org/10.1351/goldbook.D01719
Proportionality constant \(D\), relating the @F02461@ of @A00297@ of entities B to their @C01227@ \(J_{n}=- D\ \nabla c_{\text{B}}\).
Source:
Green Book, 2nd ed., p. 65 [Terms] [Book]