AN ANALYSIS OF CRYSTAL DISSOLUTION FRONTS IN FLOWS THROUGH POROUS-MEDIA, .1. COMPATIBLE BOUNDARY-CONDITIONS

Proposed in this study is a model for transport of solutes in a porous medium participating in a dissolution/precipitation reaction, in gene ral not in equilibrium. For an unbounded spatial domain, travelling wa ve solutions exist, if and only if the charge distribution is constant and the situation is a dissolution situation. The travelling wave in fact exhibits a sharp dissolution front. The wave is given in a nearly explicit manner. Also for the limit cases of equilibrium or no disper sion, travelling waves are established under the same conditions, but with different qualitative properties.