Numerical Simulation of Microchannel of Dynamic High-Pressure Microfluidization Based on FLUENT

In order to analyze the flow field within the microchannel of dynamic high-pressure microfluidization, the geometric model and mesh model are established, and the pressure and velocity distributions of the flow field in interactive chamber are obtained with SIMPLEC solution algorithm and RNG k- model using FLUENT software. The simulated results show that the high-speed jet flow impinging increases the acting force field, and the sharp increment of the flow velocity rapidly increases the velocity gradient and shear stress. All these ensure the excellent effect of the high-pressure microfuidization. In addition, because of the opposite change of the static pressure and velocity in the oscillating chamber, the dramatic changes of static pressure greatly enhance the effect of gas cavity and pressure release, which corrode the material of the interactive chamber. It is desirable to appropriately decrease feeding speed, reduce the fluid separation inlet corner angle, and choose a short discharge nozzle on the condition of ensuring the impinging speed when designing the internal microchannel of interactive chamber.