Sizes and size distributions of bubbles in a bubble column. Comparison between the two point electric probe method and the photographic method.

New Approaches for Theoretical Estimation of Mass Transfer Parameters in Both Gas-Liquid and Slurry Bubble Columns

“…It is worth noting that the major axis of a rising oblate ellipsoidal bubble is not always horizontally oriented (Yamashita et al, 1979). The same holds for the minor axis of a rising oblate ellipsoidal bubble, i.e.…”

Local phase detection probes in fluid/fluid two-phase flows

“…Underwood' 7 gives an expression for the corresponding pdf, and (24) becomes (25) Equation (25) has also been obtained by numerous other authors. 13.18-21 Kataoka,Ishii,and Serizawa' 2 have proposed, at the end of a thorough analysis, a more general expression for 7y(x).…”

“…(25) and (30), are valid no matter what the shape of the convex globules. But if we want to arrive at a complete treatment of the flow structure, giving, for instance, a globule size distribution, more stringent conditions concerning the shapes must be set forth.…”

On the prediction of gas hold‐up in two‐phase flow systems using an Euler–Euler model

“…Using the image analysis technique described above, we found average bubble diameters of 2.7 ± 0.5 mm and 1.9 ± 0.2 mm for the air‐water and air‐0.5 wt% ethanol aqueous solution systems, respectively, in the dispersed flow regime ( u sg ≤ 0.03 m/s). For air‐water dispersed flow systems, bubble diameters between 2.3 and 5 mm have been reported in the literature, depending on the column diameter and gas sparger design . For air‐0.5 wt% ethanol aqueous solution, Keitel and Onken have reported a Sauter mean diameter of about 1.7 mm in a dispersed bubble column.…”