An experimental study on slow and fast bubbles in tap water

Diffusion of Small Gas Bubbles into Liquid Studied by the Rotary Chamber Technique

“…5d collapse onto a common curve in Fig. (7) and a modified version of the Sherwood number results Sh q in d DDq dR dt (9) In [7] the experimental result for the rise velocity of spherical bubbles in the implicit dimensionless form is found Ar a Re b Re 2 (10) with a = 40.835748 and b = 0.4261221. This confirms Fig.…”

“…For velocity data we refer to [5] and [7]. Then the normalized velocity Re lends itself to be displayed as Re = Re(Ar).…”

Experimental studies on the terminal velocity of air bubbles in water and glycerol aqueous solution

“…However, the studies of Tomiyama et al [12] and Liu et al [16] showed that the initial shape deformation is expected to the main reason for widely scattered rising velocities. Especially, it is worth noting that recently Peters and Els [52] designed a special experimental setup and successfully produced slow and fast bubbles from tap water. They argued the prevailing view that either fast or slow bubbles can be found in water depending on the cleanness or contamination is not true.…”

Diffusion of Large Nitrogen Bubbles into Tap Water Studied by the Rotary Chamber Technique

“…The data are from former measurements [5]. In order to contrast the immobile interface with the mobile one the elevated upper curve was inserted into the diagram standing for fast bubbles.…”