Water droplet deformation in gas stream: Impact of temperature difference between liquid and gas

Features of the Transformation of Small Water Droplets and Large Water Bombs in Free Fall

“…3a). As can be seen from our previous investigations [13,14], the number of such shapes decreased with each subsequent cycle. For the first cycles we distinguished about ten individual forms, for the tenth and subsequent cycles -no more than five.…”

“…As mentioned before, droplets take different shapes during the disintegration of a water bomb. It should be noted, that such shapes correspond to droplet shapes, illustrated in our previous works [13,14]. Separated droplets (d 0 <8 mm) are continuously deforming when moving.…”

“…The methods for analyzing the results of our experiments were similar to that we used to study the surface deformation of single droplets [13,14]. Analyzing the video frames of our experiments, four characteristic stages may be identified.…”

“…Our previous experiments with single droplets [13,14] demonstrated that the variety of individual (non-recurring geometry, position and size) droplets shapes (sphere, ellipsoid, or "a pancake") took place. In contrast to these experiments, only two typical shapes can be defined for large water bombs: a sphere (Fig.…”

“…Separated droplets (d 0 <8 mm) are continuously deforming when moving. It can be associated with deformation modes [13,14], especially with the second "rotational" mode (the rotation of an ellipsoidal droplet about its center of mass during motion). Figure 4 shows the characteristic times between the form transitions of individual small water droplets (d 0 §4 mm) and the times between the stages of large water bomb (40<d 0 ൏110 mm) disintegration.…”