Hence, cases demonstrating foaming above a certain threshold, such as the ReOh = 2 line, are qualitatively justified. Below this line, micro-bubbles may form, but their instability prevents them from coalescing, resulting in no foaming. Similarly, bubbles surpassing a certain threshold, such as above the ReOh = 50 line, are also qualitatively justified. In this scenario, although bubbles may form slowly, their stability allows them to coalesce and potentially grow too large, leading to splashing.