Validation of bubble sizes obtained with incoherent imaging on a sloped viewing window

A test of the Tate equation to predict bubble size at an orifice in the presence of frother

“…10 Am) was determined by acquiring an image with a 10 Â 10 mm grid and 1 mm divisions placed in the focus plane, i.e., the underside of the window. The imaging setup was the same as the one used in a preceding study (Hernandez-Aguilar and Finch, 2005). Although the fundamentals of the bubble sizing protocol were discussed in that study, 3 some practical aspects and methods are reviewed here in some detail.…”

“…To cause flow, the pressure should exceed both the static water (pressure) head on the capillary tip and the slight pressure loss (due to friction) as the air flows through the supply line. This can be achieved by pressurizing an airtight reservoir with a water column (e.g., Minnaert, 1933;Vigneault et al, 1992;Hernandez-Aguilar and Finch, 2005).…”

“…(F0.5%) and precision (standard deviation = 1 Am (for D b between 0.7 and 1 mm)) have been quantified (Hernandez-Aguilar et al, 2004;Hernandez-Aguilar and Finch, 2005). A practical interest was that if the Tate equation can be verified in the presence of frother it provides a means to generate bubbles of predictable size to calibrate bubble size measurement techniques in flotation-related systems.…”

Study of the production of hydrogen bubbles at low current densities for electroflotation processes

“…However, new technologies allow the processing of information through computer software, although an operator is still needed to decide the software parameters 11. A digital camera and a computer are the only devices needed to achieve the required information 12…”