HYDRODYNAMICS OF A GAS-LIQUID VESSEL STIRRED WITH RUSHTON TURBINES INNEWTONIAN AND NON-NEWTONIAN SYSTEMS

The behaviour of a sparged vessel agitated by one, respectively two Ru shton turbines positioned on the same shaft at various distances, was investigated. Hydrodynamic regimes and dissipated power were considere d in air-water and air-starch solution systems. Two-phase flow maps we re presented in terms of dimensionless criteria of similarity: flow ra te number and Froude number for mixing. The transition to various hydr odynamic regimes is influenced upon both the apparent viscosity of the starch solution and rather the distance between turbines.