Fig. 9: Results of the sensitivity analysis.

Explosive solutions are shown in blue. Non-explosive solutions are coloured according to average exit velocity, according to the colour bar. The frequency of solutions is plotted against the input parameters (a) initial temperature, (b) initial pressure, (c) conduit radius, (d) initial H2O concentration, (e) initial CO2 concentration, and (f) initial crystal content. Results are plotted as the number of solutions, but for the input parameters (a–f) the sum of the frequencies is 100, and therefore these results are expressed as a percentage. Also presented are the frequency of solutions plotted against output parameters (g) crystal content at fragmentation (for explosive solutions) and at the vent (for non-explosive solutions) (h) mass flow rate, (i) exit velocity, and (j) viscosity, at fragmentation for the explosive case, and at the vent for the non-explosive case. For the output parameters (g–j) the sum is variable and expressed as the raw total.