The Research Of The Flow In The Internal Mixer Using Simulation Method

By simulating the flow in the Internal Mixer, it is convenient to know the performance of the mixing devices. Under the established effective and rational solution technique of finite element method, distribution flow parameters can be easily calculated. Under this circumstance, considering the exist model of 3-D isothermal full filled rubber mixing, it is more accurate to simulate a model which contains cooling system that of 3-D non-isothermal full-filled rubber mixing on the purpose of getting some valuable flow distribution phenomenon.Primary contents of this paper are as follows:1. Establish an effective and rational solution technique of finite element method:SHR-10DY is a high mixer that owned by our lab, as a prototype, it was drawn by the appliance of 3-D CAD software--Polyflow to achieve a parameter control of geometrical model; simplify the physics model and establish the mathematical model of controlling equations; get the material parameters of SSBR, get the constitutive model parameters by using the module of Polyflow—Polymat to calculate a fitting curve to get the desired parameters; set rational boundary conditions. Carry a grid partition of using hexahedron of rubber flow field, and tetrahedron of rotors and cooling water field, by the professional grid generating software Gambit. The finite element model should be set properly in the Polyflow to have a convergent numerical solution of rubber flow parameters.2. Research the flow of 60RPM rotor speed, by analysis the numerical solution of velocity, temperature, pressure, viscosity and shear rate distribution, it is well understood of the some flow patterns.3. As the same rotor configuration, research the influence of rotor speed on the performance of rubber mixing. Results indicate that there is little impact on flow parameters distribution except for the viscosity distribution. Higher rotor speed has a good benefit on rubber mixing though may lead to nonuniformity of temperature field.4. Analysis the influence of different flux of cooling water on the rubber flow, results reveal that there is little impact on the temperature distribution and have good tendency to the uniformity of temperature of rubber flow field.5. Analysis the influence of different helix angle of short ridge on the rubber flow, results manifest that smaller helix angle give rise to the distribution range but bring about lower axial transport capacity which has disadvantage on the uniformity rubber property.