Flow Field Analysis And Parameter Optimization Of Static Turbulence Mixer Without Built-in Blade

Currently, static mixers are mainly used in light industry areas; static elements are set in mixer in order to promote mixing, and mainly used for liquid-liquid mixing which has low concentration. But fewer studies refer to static mixers that can be used in solid-liquid area which has high concentration, large project situation. On the basis of the seniors’ research, this paper studied static turbulence mixer without built-in blade, which can be used in industry and mining situation.High concentration slurry was studied in the paper, unsteady incompressible navier-stokes equation, standard κ-ε equation turbulence model were used and,two-flow model based on Euler-Euler coordinate system and particle-trajectory model based on Lagrange were combined as a new way. Structural parameters were optimized by three-dimensional flow field simulation and analysis of continuous phase and particle phase in mixer used Fluent.Firstly, different groups of basic parameters were organized and relevant flow zone models were established, then Euler-Euler two-flow model and DPM model were added, particle collision and inter-phase coupling were also taken into consideration. Finally, flow field results of each group were got after unsteady numerical modeling. By result comparison, the basic structural parameters of static turbulence mixer without built-in blade: length, diameter and inlet angle were initially identified, the optimal parameter combination was got and, the influence rule of draw ratio, inlet angle on mixing effect was got. This is a key step for mixer parameters optimization.According to structure parameters initially identified, slurry flow field zone were established, the above methods were also used in this section which mainly studied the influence of position and angle change of inlet on flow field. After simulation and analysis, the optimum structural value and influence rule were got.After getting the pressure data of the optimum flow field, the shell model of mixer was established. Stress intensity analysis was implemented by FSI and the method of stress linearization. Strength analysis would start when pressure data of flow field was transferred to shell for static analysis in Ansys. Detail intensity check of different stress was done when the global stress data was got from the earlier work.