Numerical Simulation Of Fluid Field In Rotational-Disturbed Flocculator

With the development of science and technology, study on the nature of fluids and the law of motion has been made intensively. But fluid motion is very complicated, for the flow in elaborate boundaries shapes in project , in view of its complexity and difficulty of measure, the experiment on physic model is limited, only parameters total flow can be obtained in the experiment, numerical simulation can provide specific messages on related fluid field. As a result of its more virtues, numerical simulation has be powerful means of research on fluids mechanics.Hydraulic conditions make a decisive role during collision and coagulation of flocculent particles, thus controlling hydraulic conditions is the key to high efficiency flocculation. Against the new style rotational-disturbed coagulate reactor is applied well to projects, it is necessary that research into high efficiency flocculate mechanism of the new style rotational-disturbed flocculate reactor through studying the law of fluid field's change during flocculation.In this thesis, numerical simulation method is used to simulate the fluid field of the new style rotational-disturbed coagulate reactor. Combining theory of flocculation, Characteristic of fluid field in this reactor is analyzed, which provide useful reference gist for how to further optimize the reactorBesides, for the reactor with disturbed equipment, the phenomenon of separation of boundary layer produced by disturbed structures is simulated. Combining the theory of micro-vortex, the key to high efficiency flocculation of this reactor is obtained.Finally, according to similarity theory is adopted as the basis of model test in real project, thesis simulate the flow field of rectors which reduced by different scales. The results reveal the experiment effects of model test are identical to ones of the physical model when the length scale is controlled within 20.All the researches show that the new style rotational-disturbed coagulate reactor control effectively the scale of vortex, distribute reasonably energy dissipation, execute the purpose of high– efficiency flocculation. FLUENT is...