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Hi to all, I would like to ask you for some advices in choosing the right reaction paths models in REACT. I'd like to calculate a mixing model of (1) hot metal-bearing fluid (small volume, low pH, supersaturated with some mineral phase) with a (2) cold, almost pure fluid (high pH, high volume). I want to find out the amount of metals that can be removed and precipitated as minerals from hot fluids (should be mainly due to changes in T and pH) when it starts to mix with the cold fluid. I want neglect any supersaturated minerals that might be present in the initial fluids. Once the minerals precipitated as a result of the mixing of the fluids, they should be prevented from re-dissolving into the liquida at any further step of the fluid mixing. In REACT I played around with the "flow-through" and "flash" models (with "dump" option on). The results of both look quite different. Could you please give a recommendation, which model might be the best in order to describe the mineral precipitation from one fluid as a result of the 2-fluid mixing. Many thanks in advance, Sebastian