Fig. 1

Evolution of microstructure of Configuration 1 during simulation of gas bubble growth with s₀=5×10⁻⁹ s ⁻¹ and D=2 nm²/s. Simulation domain size is 72 μm ×72 μm ×72 μm. Isosurface of c=0.5 is shown. a initial conditions. b the bubbles have grown but none have begun to merge. c bubble merging and coalescence has begun. d a continuous path through the bubble phase exists from the simulation domain boundary at x=0 μm and the boundary at x=72 μm