EXPERIMENTAL STUDIES ON THE BATH OSCILLATION DURING GAS BLOWING INTO LIQUIDS .1. MEASUREMENTS USING A SINGLE NOZZLE

Experimental studies on the wave motion during gas blowing into a liquid were carried out on the systems water/air and Wood's metal/nitrogen under various blowing conditions. Variables of the measurement were the gas flow rate, the bath depth, the vessel diameter and the nozzle diameter, The measured results showed that a wave motion appears only if the gas flow rate exceeds a critical value which depends on the bath depth. The blowing conditions for wave formation can be characterized by the relation of the bath depth to the vessel diameter and by the specific gas flow rate per unit of volume of liquid. The frequency or the oscillation period of the wave mainly depends on the vessel diameter. The amplitude of the wave follows a logarithmic function of gas flow rate. The density of liquid and the nozzle diameter have hardly any influence on the wave formation and the wave motion.