抄録
Experiments have been performed on the mixing of horizontally-injected high-density solution in vertically-upward water flow. The experimental conditions have covered injected solution densities of 1200,1300 and 1400kg/m^3,a solution injection flow rate of 0.15l/min and water flow rates from 0.3 to 10l/min. Mixing patterns observed in the experiments have been classified to two groups, i. e. complete mixing (entrainment) and incomplete mixing (entrainment). In the complete mixing, the injected high-density solution is mixed (entrained) completely into the vertically-upward water flow. Numerical calculations on a two-dimensional laminar flow have also been performed by solving a continuity equation and momentum equations in two directions for total fluid, and a mass transfer equation for solute, in consideration of the density variation. The numerical calculations have predicted nearly the minimum water flow rates in which the complete mixing was achieved in the experiments.
