| Popis: |
Numerical analysis was performed to simulate two-liquid flows in a micro-spiral channel. Square, long vertical rectangle, long horizontal rectangle and circular cross sections were used to compose the spiral channels. The nominal hydraulic diameter of the channel is about 100 μm. The Reynolds number, pitch and mean diameter of the helical coil were varied to investigate their effect on the flow mixing. The mass conservation, alpha diffusivity and momentum conservation equations as the governing equations were used to mathematically model the problem, and the ‘twoLiquidMixingFoam’ solver within the OpenFOAM was used to solve the governing equations. As a result, it was found that the mixing of two liquids is greatly improved in the spiral channel in comparison with a straight channel. Pitch and mean diameter of the helical coil show a significant influence on the mixing performance. |
