Figure 2: Theoretical ((6.8), solid line)) and experimental dependence between ( is the first linear eigenfrequency, is the corresponding nonlinear eigenfrequency) and the maximum ratio between the drop heights and width (H/W). Experimental values [12] are for 0.49 cm () and 0.62 cm (). Theoretical results do not depend on and within the framework of an ideal incompressible liquid model. The figure also shows numerical results from [19] (dashed line), [33] (∆) and [34] (▲).