Prediction of mixing time in a bubbly two-phase stirred tank by optical method

The mixing field in an aerated stirred reactor with two Rushton turbines was experimentally analysed using the particle image velocimetry and double-planer laser-induced fluorescence measurement techniques. The mixing characteristics were measured at three different impeller rotational speeds: 225, 300 and 400 rpm, for both single- and bubbly two-phase mixing systems. The mixing time was determined from the response curves to a pulse injection of a Rhodamine-590 tracer into the stirred tank. A considerable reduction in mixing time was achieved by increasing the impeller speed and implementing aeration.

کلیدواژه ها:

mixing ، mixing time ، two- phase flow ، stirred tank ، optical method ، laser