Bubble formation in shear-thinning fluids: Laser image measurement and a novel correlation for detached volume

Bubble formation in shear-thinning fluids: Laser image measurement and a novel correlation for detached volume

Blog Article

A laser image system has been established to quantify the characteristics of growing bubbles in quiescent shear-thinning fluids.Bubble formation mechanism was investigated by comparing the evolutions of bubble instantaneous shape, volume and surface area in GLUCOMANNAN two shear-thinning liquids with those in Newtonian liquid.The effects of solution mass concentration, gas chamber volume and orifice diameter on bubble detachment volume are discussed.

By dimensional analysis, a single bubble volume detached within a moderate gas flowrate range was developed as a function of Reynolds number ,Re, Weber number, We, and gas chamber number, Vc, based on the orifice diameter.The results reveal that the generated bubble presents a slim shape due to the shear-thinning effect of the fluid.Bubble detachment volume increases with the solution mass concentration, gas chamber volume and 2 Piece Dresser orifice diameter.

The results predicted by the present correlation agree better with the experimental data than the previous ones within the range of this paper.