不同入口流量二沉池非牛顿液体/固体两相模拟

The OpenFOAM computational fluid dynamics package is employed to study the two-phase fluid behaviors in the tank. The package is validated through comparing numerical predicted velocity profile and sludge profile. Numerical tests of solid/liquid two-phase flows with different inlet flow rate and liquid recycling and rheological properties are performed. It is found that with increase of the inlet flow rate, the liquid velocity becomes relatively higher in the entrance area and expands to the reflux region of the sludge hopper. Liquid phase flow field develops from a two-layer structure to a three-layer structure. The peak concentration of sludge in the tank increases continuously, and the area with a high sludge concentration in the bottom of the sludge layer and the sludge hopper also expands. The average concentration of sludge at the outlet and reflux region of the sludge copper is also increases, and the sludge settling velocity in the upper part of the two sedimentation tanks increases slightly.