Computational Fluid Dynamic Modeling of a Mixing Stirred Reactor: Three-Dimensional Axisymmetric Models

Multiphysics simulation of added carbon particles within fluidized bed anode zinc-electrode

“…During the real laboratory Secondly, the two-electrolyte solution includes 3 moles of ZnBr2, 1 mole of KCl and 1 mole of ZnCl 2 for the anode concentration and the cathode concentration includes 3 moles of KBr and 1 mole of KCl. These chosen and prepared concentrations were considered to prevent having excess salt during charge [35,36].…”

Two-Dimensional Modelling and Validation of the Mass Flow in a Mixing Stirred Reactor

“…A microstructural analysis of cross-sections of the coated iron particles was carried out using a scanning electron microscope (SEM, Tesla BS 340, Czech Republic). Figure 3 shows the fluid flow profile of the model presented in this work in comparison with the model presented in the previous paper [18]. As both the models are generated with the same input quantities for the electrolytic cell without a rectangular electrode, the 2D model (Figure 3(b)) is the reduced form of the 3D one (Figure 3(a) By comparing these figures, one can see that the distribution of the fluid velocity, which is shown in both numerical values and vectorial form (the colouring as well as the position), is slightly similar.…”

“…The data presented in Figures 4 and 5 reveal that the stirrer size has an important impact on the fluid flow in this system. At given conditions-i.e., in the "high cell" (the socalled "high cell" because of the ratio of the radius to the height of this cell is 1:2 -in the same way as in our former work [18])-with the cylindrical electrode and at the same rotation speed of the stirrer (with angular velocity ω=100), the flow pattern depends upon the size of rotating stirrer, which was varied from 0.005 to 0.01. The Arrow plots for the "high cell" in the presence of the cylindrical electrode with the "small stirrer" and the "big stirrer" are presented in Figure 6.…”

“…The basic theoretical features, the problem formulation and the hydrodynamic conditions for 3D axisymmetric models of a mixing stirred electrolyzer were described in the previous paper [18]. Here, the formulation was extended to a 2D framework.…”

“…Thus, our purposes was to better understand the relationships between the variables of cell geometry, the stirrer characteristics, the presence of a solid electrode and the response of the fluid flow, as well as to optimize the operating conditions by using the Chemical Engineering Module of the COMSOL Multiphysics 3.2 software. In our previous study [18], the basic fluid-dynamic three-dimensional (3D) models were developed to help predict the influence of the operating parameters on the fluid flow for the mixing of the stirred electrolytic cell. The present paper is devoted to a comparative analysis of simple models representing 2D simulations of fluid flow patterns in an electrochemical reactor.…”