Planar baffles of full length were arranged under the angle equal to 90 o or 60 o in relation to the cylindrical wall of the vessel. The system of pitched blade turbines ( Z = 45 β = 45 o) of diameter d = 0.605 D was used. The experiments were carried out in the vessel of inner diameter D = 0.4 m filled by the liquid up to height H = (1–1.5) D. Heyter and Wollny ( 2017) examined the effect of different baffle variations on the agitation efficiency in the vessels equipped with axial multi-impeller system in order to determine power number. ( 2016) concluded that power consumption decreases with the increase in the radius of the baffle curvature for the clockwise rotational direction of the impeller. Each baffle was in shape of the annulus sector situated vertically in relation to the cylindrical vessel wall. The authors tested the effect of the baffle curvature at the system with four baffles of width B = 0.1 D. ( 2016) carried out CFD study on the effect of baffles of full length on the energy consumption and the flow structure in an agitated vessel equipped with the Rushton turbine. Their results showed that baffles can effectively transform the circumferential flow to vertical and radial flows. ( 2011) investigated the baffling effect on the enhancement of mixing under a laminar condition in the vessel with two-bladed paddle impeller and two baffles. However, the excessive baffling and sparging gas through the impeller would interrupt the liquid mixing and increase the mixing time. The authors proved that insertion of the appropriate number of baffles improves the extent of liquid mixing. ( 1997) examined the effects of width B and number J of baffles in the agitated vessel with single or triple standard Rushton turbine for systems with and without aeration. 1992).Įffects of the geometrical parameters of the baffles of full length on the agitation efficiency were tested experimentally and numerically. Power characteristics for the systems agitator-planar baffles of full length-vessel system within the wide range of the Re numbers are presented in the literature by many authors (Rushton et al. Baffling effect can be described by the dimensionless parameter J × ( B/ D) × ( L/ H), which is equal to 0.4 for the standard geometry of the baffled agitated vessel (i.e. Liquids of low viscosity are usually agitated in the vessels of inner diameter D, equipped with the high-speed impeller and four ( J = 4) planar baffles of width B = 0.1 D and length L = H.