Influence of two-fluid turbulence models on the calculation of solid-liquid two-phase flow field
ZHANG Zichao1,3, LI Yanpin2,3*, CHEN Dexin1
1. School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China; 2. Ural Institute, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China; 3. Henan Fluid Machinery Engineering Technology Research Center, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China
Abstract：In order to study the influence of different two-fluid turbulence models generated by diffe-rent modeling methods to close the governing equations on the results of solid-liquid two-phase flow, three two-fluid turbulence models were used to investigate the numerical calculation of solid-liquid two-phase flow in a circular pipe. Under different particle sizes, different solid concentrations and different flow velocities, the effects of the three two-fluid turbulence models on the solid concentration distribution and solid velocity were studied and compared with the experimental data. The results show that under different working conditions, the calculation results of the solid phase concentration of the three two-fluid turbulence models has large errors near the wall, and are more suitable for calculating the solid-liquid two-phase flow field with high velocity and high solid concentration. The three models can obviously affect the calculation results of solid-liquid two-phase flow field with large particle size particles, but has little effect on small sized particles. The km-εm model can be applied in a wide range of solid concentration and fluid velocity, owing to its a wider applicability. Considering the accuracy of calculating parameters of solid-liquid two-phase flow field, the kl-εl-As model is better when the particle size is greater than 165 μm, and the km-εm model is better when the particle size is less than 165 μm.
