Dissolution in a field

Details Dissolution in a field Dissolution in a field

2001-05-31

arxiv.org/abs/cond-mat/0105615v1

Phys. Rev. E 64, 041606 (2001)

Physics

Condensed Matter

Statistical Mechanics

6 pages, 6 figures, 2-column format, for submission to PRE

Scientific paper

10.1103/PhysRevE.64.041606

We study the dissolution of a solid by continuous injection of reactive ``acid'' particles at a single point, with the reactive particles undergoing biased diffusion in the dissolved region. When acid encounters the substrate material, both an acid particle and a unit of the material disappear. We find that the lengths of the dissolved cavity parallel and perpendicular to the bias grow as t^{2/(d+1)} and t^{1/(d+1)}, respectively, in d-dimensions, while the number of reactive particles within the cavity grows as t^{2/(d+1)}. We also obtain the exact density profile of the reactive particles and the relation between this profile and the motion of the dissolution boundary. The extension to variable acid strength is also discussed.

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