Wettability Effect on Bubble Formation at a Rigid Porous Sparger

Abstract The role of solid wettability on bubble formation was examined using three rigid spargers with water contact angles 0, 64 and >90°. The contact angles, varied by heating the sparger material, were determined by the Washburn and modified Washburn methods. It was confirmed by permeability measurement that heating did not alter the pore structure. The results showed no effect of sparger wettability on the size of bubble produced.

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