Figure 12
Stages of Kelvin–Helmholtz instability formation in a Venturi tube imaged at 1.128 MHz: (a) the flat-field-corrected images at three different time points and (b) the images after phase retrieval methods based on the alternating direction method of multipliers (Villanueva-Perez et al., 2017). Videos S1 and S2 of the supporting information show the flat-field-corrected and phase-retrieved data, respectively. |