上昇する気泡周りの流れと物質移動に関する数値シミュレーション

抄録

An effective numerical method for the prediction of the convective mass transfer from a dispersed gaseous phase is proposed. To enhance the prediction capability for the advection of the concentration as well as the volume fraction for the bubbly flow, the mixed Youngs-centered method and the Lagrangian-explicit scheme are applied together with the volume-of-fluid method. The dissolution of gas at the gas-liquid interface is modeled based on the Henry's law, and is implemented by an overwriting method for the mass transfer in the liquid. The validation of the present method is performed for the two-dimensional advection problem and the one-dimensional diffusion problem. Preliminary results on the mass transfer from freely rising bubbles in an initially quiescent liquid are also demonstrated.