Abstract: The interior flow-field of the water saving faucet bubbler is simulated by the Fluent software to study the flow characteristics of a two phase flow. According to the flow characteristics in the faucet bubbler, an Eulerian-model with the two phase flow and the RNG (re-normalization group) κ-ε turbulence model are established separately to analyze the distribution of the gas-liquid phase volume fraction and the velocity at the exit section. Results show that the increased velocity of the inlet flows accelerates the dispersion of the gas and liquid at the exit section. Furthermore, the commute-net disperses the flow and reduces the flow velocity at the same time. Additionally, staggering the grid of the commute-net between the adjacent layers improves the distribution of the liquid phase in the exit section, and the commute-net with a 3-level grid achieves an even better flow effect.