Abstract
An analysis of turbulent transport patterns in mixers revealed specific features of the flow hydrodynamics of the mixed medium with regard to mixers either without internal devices or with internal devices of small cross-section. Despite the increasing popularity of mixers without internal devices, experimental studies were carried out mainly in mixers with baffles, since they provide a higher turbulence of the mixing process allowing effective preparation of foam concrete mixtures with evenly distributed components throughout the mixer volume. Experimental studies of the dependence of peripheral velocity on the characteristics of the internal devices of the mixer in the preparation of foam concrete mixtures showed a high degree of agreement between the experimental and calculated data. Calculations based on the equations provided in the article and measurement results indicate that, when fixed elements are attached to the mixer, the circumferential velocity is significantly reduced. It should be noted that the fixed devices installed in a mixer are affected by hydrodynamic forces. The results of the conducted experiments and comparisons demonstrated that, when preparing a foam concrete mixture in a turbulent mixer without internal reflective baffles, the effect of a cylindrical surface with a turbulent diffusion ratio equal to zero makes it impossible to evenly distribute the mixture components throughout the volume and pore the mortar mixture.
Published Version
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