Numerical Simulation Study on Polymer Dispersion and Dissolution System

The water-powder mixing by Venturi jet and mixing tank mixing are important processes in the injection stage of polymer flooding. In order to study the mixing and dispersing effect of the Venturi jet and the mixing tank, the computational fluid dynamics software FLUENT was used to simulate and analyze the multiphase flow field of the disperse and dissolution system. The mixing performance of water and powder by the Venturi jet under different working conditions was analyzed. The multiphase flow field in the mixing tank was numerically simulated to obtain the distribution of velocity, volume fraction, pressure and turbulent kinetic energy of each phase. Then, the mass fraction of the polymer powder and the dispersion and dissolution effect of the polymer under corresponding conditions was analyzed. The results showed that, with the combination of Venturi jet and the mixing tank, the polymer powder could be uniformly and fully dispersed into the water, which is theoretically superior to the air-mixing. The study results could provide references for the on-site polymer injection process.