Abstract
An experimental investigation of the concentration fluctuation in a concurrent bubble column is carried out. The continuous stationary tracer injection technique is used and the followings are resulted. The auto-correlation function of the concentration fluctuation, one of the characteristics of the intensity of the time variation, is approximately exponential. The regularity of the concentration fluctuation decreases with the increase of the gas velocity and increases with the liquid velocity.
At some distance from the tracer injection point, the variance of the fluctuating concentration decreases exponentially with distance or mean passage time. The decreasing rate of the variance of the fluctuating concentration is increased with increasing the liquid velocity, the gas velocity and the hole number of the gas distributor.
