BUBBLE AND LIQUID FLOW CHARACTERISTICS IN A CYLINDRICAL BATH DURING SWIRL MOTION OF BUBBLING JET

Gas injection into a cylindrical bath through a centric bottom nozzle causes a swirl motion like rotary sloshing. Conditions indicating the initiation and cessation of the swirl motion have been made clear by m any researchers. So far, the effect of the swirl motion on transport p henomena in the bath is not clear yet. The present study was made to c larify the bubble characteristics (void fraction, bubble frequency) an d liquid flow characteristics (mean velocity, turbulence intensity, Re ynolds shear stress) during swirl motion of bubbling jet. These two ch aracteristics were investigated using an electro-resistivity probe and a two-dimensional LDV, respectively.