= Reactive infiltration instability
Reactive infiltration instability is the positive feedback in which reaction or melting increases <permeability of a porous medium>, focuses more reacting fluid into that region, and further increases permeability. Finite reaction-zone thickness, transport, and pore geometry can change the short-wave behavior; https://arxiv.org/abs/1306.5034[Interacting length scales in the reactive-infiltration instability] analyzes transport and reaction length scales in a dissolution model.
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