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Experimental study of mixing characteristics in a bubble column
Islam MD Zahidul(자히둘),Jubeom Lee(이주범),Hyungmin Park(박형민) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Mixing and transport processes are the key issues in studying two-phase bubbly flow in a bubble column. Especially, the bubble-induced liquid phase mixing is a complex function of void fraction distribution, gas phase velocity and so on. To study the characteristics of the mixing induced by the bubbles, we have designed a rectangular bubble column where the mean void fractions ranging from 0.006 to 0.075%. High-speed shadowgraphy technique is used to measure the different gas phase properties such as bubble size, void fraction, and bubble velocity. To measure the mixing, on the other hand, we have used a direct visualization method with low diffusive buoyant dye. The results reveal both quantitative and qualitative measurements of the mixing characteristics depending on bubble column hydrodynamics.