Initiation Time of Vortex and its Arrival Time to Impeller under Mechanical Agitation
Shingo SATO, Tatsuya OHMI, Manabu IGUCHI
Experimental investigations have been carried out on the initiation time of a vortex and its arrival time to the impeller in a mechanically agitated water bath. The vortex initiation time is defined as the period from the start of impeller rotation to the initiation of a vortex, and the vortex arrival time is defined as the period from the start of impeller rotation to the moment at which the vortex arrives at the impeller. Empirical equations are proposed for the two characteristic times as functions of the rotation frequency of impeller and the geometrical parameters such as the depth of the water bath and the height of the impeller position.