Spatial Evolution of CO2‐Contaminated Water Bubble Flows in a Vertical Pipe

Experiments on CO2‐water bubble flows in a vertical pipe were carried out for clean water, an aqueous NaCl solution, and an aqueous NaCl solution with 1‐octanol to obtain databases of spatial evolutions of the flows with the impurities. Mass transfer correlations for bubbles in these liquids were implemented into a one‐way bubble tracking method. Numerical predictions of the spatial evolution, e.g., transition from a bubbly to a slug flow, depending on the impurities agreed well with the experiments. Experimental and numerical data of bubbly pipe flows in water with impurities (NaCl and 1‐octanol) are presented. A bubble tracking method implementing mass transfer correlations accounting for the effects of the impurities gives good predictions of the spatial evolutions of the bubble flows, e.g., transition from a bubbly to a slug flow in the impure system.