Fig. 2
From: Analysis of dynamic levitation process of the particle chain in a nonlinear standing wave field
Schlieren method to observe the change of the particle chain levitation bifurcation waveform. a–c At this time, the height of the resonant cavity is an integer multiple of the half-wavelength. The three figures are all standard standing wave acoustic field shapes. It can be seen that the waveform at this time is slightly narrower as a conical standing wave field. d–f When the height change increases by λ/8, the shape of the acoustic field of the three diagrams changes significantly. It can be seen that the lower part of the waveform is significantly widened and the bifurcation is obvious.
