## 3 Results and Discussion
### How Accurate Are Transition Criteria?
[7]'s correlation should include a range of dimensionless thicknesses in order to universalize the criterion. However, one may question how far can we extrapolate these transition criteria to assess their universally? The dimensionless numbers in the criteria allow the use of empirical correlations in  
Figure 12: Comparison of the experimental results with the proposed transition criteria established by [PERSON] and [PERSON] [4], [PERSON] et al. [5], [PERSON] and [PERSON] [6], and [PERSON] et al. [7] within their validation ranges. Color scheme: black—the phenomena obtained experimentally agree with the criteria; white—the phenomena obtained experimentally do not agree with the predicted outcome; gray—do not belong within the validation range of that criterion. completely different impact conditions. Considering this, Figure 13 shows an info-graphic identifying the results when extrapolating the different transition criteria to explore their outcome in regions outside their validation domain. Similarly to the last figure, the impact conditions are identified, and, the increase of droplet initial diameter (\(D_{0}\)) and droplet impact velocity (\(U_{0}\)), established by the arrows. The agreement of the experimental results and the criteria were described by a new color scheme. Black represents the cases where the phenomena obtained experimentally agree with the criteria within the validation range, white displays the cases where the phenomena obtained experimentally do not agree with the predicted outcome within the validation range, grey defines the cases where the phenomena obtained experimentally agree with the criteria outside the validation range, and beige  
Figure 13: Comparison of the experimental results with the proposed transition criteria established by [PERSON] and [PERSON] [4], [PERSON] et al. [5], [PERSON] and [PERSON] [6], and [PERSON] et al. [7]. Color scheme: black—the phenomena obtained experimentally agree with the criteria within the validation range; white—the phenomena obtained experimentally do not agree with the predicted outcome within the validation range; gray—the phenomena obtained experimentally agree with the criteria out of the validation range; beige—the phenomena obtained experimentally do not agree with the predicted outcome out of the validation range. represents the cases where the phenomena obtained experimentally do not agree with the predicted outcome outside the validation range. There were also two cases identified with an \"R\", which means rebound. Since the phenomena obtained were different from the ones predicted by the criteria the authors decided to identify it differently. Now, considering all the experimental data, the fitting of the criteria changed significantly. The criterion proposed by [PERSON] and [PERSON] [4] predicts correctly 83% of the data. This shows that the efficiency of the correlation decreases significantly for data out of the validation range. [PERSON] et al. [5] predict accurately 74% of the results. Its prediction decrease but not substantially. This criterion fits better droplet impacts with thinner liquid films. However, it should fit equally all thicknesses since it is the only one that considers the influence of the liquid film thickness. [PERSON] and [PERSON] [6] show good agreement for higher Weber numbers and fits correctly 89% of the cases. In this case, the prediction capability increased for values outside the validation range. Finally, [PERSON] et al. [7] shows a great agreement for higher impact velocities. This is the criterion that better predicts the outcomes of our experiments, fitting 93% of the cases correctly. The final assessment from the new info-graphic is favorable to the [PERSON] et al. [7] correlation as the one with the greater universality, being able to predict correctly cases outside its validation range. What is so special about [PERSON] et al. [7] criterion? It proved to be a universal criterion, but it does not even account for the influence of the liquid film thickness.