Abstract
The dissolution mechanism of rock salt under the effect of gravity was investigated in the laboratory using a dynamic dissolution test apparatus. Rock salt specimens were subjected to dissolution at different flow rates and the weight of the dissolved salt was measured over time and a comparison between the dissolution weight changes under the effect of gravity of this paper and those of dissolution without considering the gravitational effect was analyzed. After introducing the partial differential equations of a dynamic dissolution which conducted in a non-gravity condition, the influence of different parameters on the dissolution model was discussed to establish the dynamic dissolution model of rock salt under gravitational effect. Then, a numerical solution based on the finite-difference method and parameter inversion was conducted, whose numerical calculation results were in good agreement with the experimental results. The results of this paper can provide a basic theoretical foundation and analytical means that can serve a guide for studies on the dissolution mechanism of rock salt.
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