For a quantitative comparison between simulation and experiment, we have investigated the dissolution of a circular chip, 20 mm in diameter and 0.5mm thick, within the same microfluidic cell. In this case the there is no gap on top of the chip and the fluid flows around it. The initially circular chip (left panel) dissolved asymmetrically, because of the fluid flow (left to right). After 4 days the chip is adopting a petal shape, with a sharp tip pointing in the downstream direction (center). The simulation generates a similar shape (right).The area of the dissolved chip can be extracted from the images and the results are plotted in Figure 2. The simulations include a correction to the diffusivity from the activity coefficients of the aqueous ions. This makes for a significant (25%) slowing down of the time scale by reducing the effective diffusion of the ions and brings the simulation results into better, but not yet perfect agreement with experiment. The discrepancies remain an active area of investigation.