Figure 1
From: Pure single-mode Rayleigh-Taylor instability for arbitrary Atwood numbers

Comparisons of the dimensionless amplitudes of the bubbles (a) and the spikes (b) among the mesh steps h = 1/1250 (pentagons), h = 1/2500 (circles), h = 1/5000 (solid circles), and h = 1/6000 (solid stars) for Atwood number A = 0.5 vs dimensionless time \(\sqrt{kg}t\). The initial amplitude of the interface is kε = 0.1256.